Cita APA (7th ed.)

Singer, H. W. (1987). Food aid: The challenge and the opportunity. Clarendon Press.

Cita Chicago (17th ed.)

Singer, Hans Wolfgang. Food Aid: The Challenge and the Opportunity. Oxford: Clarendon Press, 1987.

Cita MLA (9th ed.)

Singer, Hans Wolfgang. Food Aid: The Challenge and the Opportunity. Clarendon Press, 1987.