Using Merril C. Tenny’s definition of a citation as being “almost exact verbally and which are definitely referred to a given author”, there are virtually no direct citations of the Old Testament Apocrypha in the New Testament. Many quotations, but no citations. This is not really a problem, for the New Testament quotes and alludes to the Old Testament often, but cites rarely. The New Testament was written by people with such familiarity with the Old Testament scriptures that they evidently did not feel the need to give exact citations. Moreover, the writers of the New Testament were not preparing academic papers, and the Chicago Manual of Style did not exist. So they used quotations and allusions freely, assuming a degree of scriptural familiarity on the part of their readers.
Jude is one of two books that cites a source outside the Protestant canon.
It was also about these men that Enoch, in the seventh generation from Adam, prophesied, saying, “Behold, the Lord came with many thousands of His holy ones, to execute judgment upon all, and to convict all the ungodly of all their ungodly deeds which they have done in an ungodly way, and of all the harsh things which ungodly sinners have spoken against Him.” (Jude 1:14-15)
This citation of the book of Enoch was one reason why the canonicity of Jude was a matter of dispute among the early church. In the fifth century, the Syriac Church settled on a 22 book canon that does not contain the book of Jude, along with other disputed books (II Peter, II & III John, and Revelation.)This canon is still in use today among the Nestorians.
The books of James and Romans also cite a source outside the Protestant canon. The citation from James is particularly compelling.
Was not Abraham our father justified by works, when he had offered Isaac his son upon the altar? Seest thou how faith wrought with his works, and by works was faith made perfect? And the scripture was fulfilled which saith, Abraham believed God, and it was imputed unto him for righteousness: and he was called the Friend of God. (James 2:21-23)
James cites as scripture a passage found in the first book of Maccabees. “Was not Abraham found faithful in temptation, and it was imputed unto him for righteousness?” (1 Macc 2:52) This is a direct quotation, which should put to rest the Protestant argument against their being no quotations from the Apocrypha that cite them as Scripture. The apostle Paul also cites the same passage from 1 Maccabees in his extended argument regarding Abraham’s faith. (Rom 4:13-22)
Game, set, match.
 (Tenney 1963, 301)
 (Lieuwen, The Emergence of the New Testament Canon 1995)
Lieuwen, Daniel F. “The Emergence of the New Testament Canon.” St Nicholas Russian Orthodox Church, McKinney (Dallas area) Texas. 1995. http://www.orthodox.net/faq/canon.htm#267 (accessed January 15, 2014).
Tenney, Merrill C. “The Old Testament and the Fourth Gospel.” Bibliotheca Sacra (Dallas Theological Seminary), no. 120 (October 1963): 300-308.