APA (7th ed.) Citation

Wylie, P. (1970). The spy who spoke porpoise. [publisher not identified].

Chicago Style (17th ed.) Citation

Wylie, Philip. The Spy Who Spoke Porpoise. New York, Pyramid Books: [publisher not identified], 1970.

MLA (9th ed.) Citation

Wylie, Philip. The Spy Who Spoke Porpoise. [publisher not identified], 1970.