APA (7th ed.) Citation

Adler, B. (1967). Letters to the Air Force on UFOs (1a. ed.). Dell Book.

Chicago Style (17th ed.) Citation

Adler, Bill. Letters to the Air Force on UFOs. 1a. ed. Nueva York: Dell Book, 1967.

MLA (9th ed.) Citation

Adler, Bill. Letters to the Air Force on UFOs. 1a. ed. Dell Book, 1967.