APA (7th ed.) Citation

Cottrell, L. (1969). The great invasion (1st ed., 5th. printing.). Pan Books.

Chicago Style (17th ed.) Citation

Cottrell, Leonard. The Great Invasion. 1st ed., 5th. printing. London: Pan Books, 1969.

MLA (9th ed.) Citation

Cottrell, Leonard. The Great Invasion. 1st ed., 5th. printing. Pan Books, 1969.

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