APA aipamena

Johnson, D. G. (1973). World agriculture in disarray. London: MacMillan.

Chicago Style aipamena

Johnson, D. Gale. World Agriculture in Disarray. London: MacMillan, 1973.

MLA aipamena

Johnson, D. Gale. World Agriculture in Disarray. London: MacMillan, 1973.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.