Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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