Cita APA (7th ed.)

Singer, H. W., Wood, J. B., & Jennings, A. (1987). Food aid: The challenge and the opportunity. Clarendon Press.

Cita Chicago (17th ed.)

Singer, H. W., John B. Wood, i Anthony Jennings. Food Aid: The Challenge and the Opportunity. Oxford: Clarendon Press, 1987.

Cita MLA (8th ed.)

Singer, H. W., et al. Food Aid: The Challenge and the Opportunity. Clarendon Press, 1987.