Παραπομπή APA

Duncan, E. R. (1977). Dimensions of world food problems. IOWA State University Press.

Παραπομπή Chicago Style

Duncan, E R. Dimensions of World Food Problems. USA: IOWA State University Press, 1977.

Παραπομπή MLA

Duncan, E R. Dimensions of World Food Problems. IOWA State University Press, 1977.