APA aipamena

Robereto Michael A. Mount Everest ---- 1996. Harvard Business.

Chicago Style aipamena

Robereto Michael A. Mount Everest ---- 1996. : Harvard Business.

MLA aipamena

Robereto Michael A. Mount Everest ---- 1996. Harvard Business.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.