Gaya APA

John, H, W., Stanley, J, R. (1989). 1988 World Food Conference Proceedings Volume I : Policy Addresses . USA: The Iowa State University Press.

Gaya MLA

John, Helmuth, W., Stanley, Johnson, R. "1988 World Food Conference Proceedings Volume I : Policy Addresses". USA: The Iowa State University Press, 1989. Teks.