APA aipamena

Williams, D. (1978). Commerce (5th.). Longman.

Chicago Style aipamena

Williams, D. Commerce. 5th. London: Longman, 1978.

MLA aipamena

Williams, D. Commerce. 5th. Longman, 1978.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.