APA aipamena

Hayes, J. W. (1966). Protecting our food. U.S. Govt. Printing Office.

Chicago Style aipamena

Hayes, John Williams. Protecting Our Food. [Washington]: U.S. Govt. Printing Office, 1966.

MLA aipamena

Hayes, John Williams. Protecting Our Food. U.S. Govt. Printing Office, 1966.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.