APA (7th ed.) Citation

Jackson, R. (1991). Unexplained mysteries of World War II. Smithmark.

Chicago Style (17th ed.) Citation

Jackson, Robert. Unexplained Mysteries of World War II. New York, N.Y.: Smithmark, 1991.

MLA (9th ed.) Citation

Jackson, Robert. Unexplained Mysteries of World War II. Smithmark, 1991.

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