APA Citation

Books, T. (1987). Mysteries of the unknown: The UFO phenomenon. Time-Life Books.

Chicago Style Citation

Books, Time-Life. Mysteries of the Unknown: The UFO Phenomenon. Time-Life Books, 1987.

MLA Citation

Books, Time-Life. Mysteries of the Unknown: The UFO Phenomenon. Time-Life Books, 1987.

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