APA (7th ed.) Citation

Harwood, J. (2014). Unexplained mysteries of World War II (First published.). the History Press.

Chicago Style (17th ed.) Citation

Harwood, Jeremy. Unexplained Mysteries of World War II. First published. Stroud: the History Press, 2014.

MLA (9th ed.) Citation

Harwood, Jeremy. Unexplained Mysteries of World War II. First published. the History Press, 2014.

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