The author's uses of past, present, and future tenses are helpful in dating. This is especially effective in dating the Gospel of John. Personal pronouns can also be helpful in establishing the author's presence at various places as evident in the book of Acts. Comparing one author's statements to other authors who are more specific in identifying the time element is very beneficial in dating, especially the book of Revelation. The involvement of different authors addressing the same issues is also helpful in dating.
Some books deal with the same questions and problems.
This indicates a broad need for attention from many authors. This would indicate the same time period. While none of these methods are necessarily conclusive, they become very helpful in reaching valid decisions when dating Bible books. Use them wisely and carefully and I believe you will find them productive. Dating the Apocalypse It is readily apparent to the observant student that John does not place a date upon the book of Revelation.