APA (7th ed.) Citation

Emenegger, R. (1974). UFO's, past, present, and future. Ballantine Books.

Chicago Style (17th ed.) Citation

Emenegger, Robert. UFO's, Past, Present, and Future. New York: Ballantine Books, 1974.

MLA (9th ed.) Citation

Emenegger, Robert. UFO's, Past, Present, and Future. Ballantine Books, 1974.

Warning: These citations may not always be 100% accurate.