APA aipamena

Duncan, R. (1992). Agricultural Futures and Options. ELSEVIER.

Chicago Style aipamena

Duncan, Richard. Agricultural Futures and Options. ELSEVIER, 1992.

MLA aipamena

Duncan, Richard. Agricultural Futures and Options. ELSEVIER, 1992.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.