APA aipamena

PARSONS WJ. (1982). IMPROVING PURCHASING PERFORMANCE. GOWER.

Chicago Style aipamena

PARSONS WJ. IMPROVING PURCHASING PERFORMANCE. ENGLAND: GOWER, 1982.

MLA aipamena

PARSONS WJ. IMPROVING PURCHASING PERFORMANCE. GOWER, 1982.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.