The fact is that Jesus and the apostles unquestionably use the Deuterocanonicals, even if the authors do not explicitly say, “It is written”. and apply it to the Deuterocanonicals. In fact, on many occasions in Scripture likewise there are allusions to Protocanonical books without the specific phrase ‘It is written’ preceding that. Now a cogent example of a reference to a Deuterocanonical book is that found in Hebrew 11:35:
Women received their dead raised to life again: and others were tortured, not accepting deliverance; that they might obtain a better resurrection .
This is as close to a citation as one could get, as it is obvious that Hebrews 11:35, the second part, is speaking of the brothers in the Maccabees who died in the hope to rise again to a better life. See 2nd Maccabees 7. No Protocanonical book has those events, where someone is tortured, and has the hope of the resurrection of life. Also, elsewhere there is a borrowing from Deuterocanonicals in the New Testament, even if there are not formal citations which are preceded by “It is written.” Paul for example, in Romans 1:19-32, clearly borrows from Wisdom 13. Wisdom 2:18-20 is clearly referred to in Matthew 27:43 as well. Also, James 1:19 clearly alludes to Sirach 5:11:
James 1:19 Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath.
Sirach 5:11: Be quick to hear, and be deliberate in answering.
There are other references as well. Even if there are not quotations per se, the ideas are intertwined and a borrowing from the Deuterocanonicals is clear. An url that goes into even more allusions and borrowing from the Deuterocanonicals is here (including prophecies):
scripturecatholic.com/deuterocanon.html Another url that gives plenty of examples of the deliberate use of the Deuterocanonicals are here (at the bottom of the url)
geocities.com/Athens/Forum/3975/deuter.htm Thus, uses to eliminate these books not only do not eliminate these books as he ignores the clear use of these passages by Jesus and the apostles, but would eliminate 12 of the Protocanonical books that he accepts.