APA aipamena

BULL, G. (1977). The Director's Handbook George Bull. McGraw-Hill.

Chicago Style aipamena

BULL, George. The Director's Handbook George Bull. McGraw-Hill, 1977.

MLA aipamena

BULL, George. The Director's Handbook George Bull. McGraw-Hill, 1977.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.