Cita APA (7a ed.)

GIBSON, J. (1990). SUPERVISORY CHALLENGES. MERRILL PUB. CO.

Cita Chicago Style (17a ed.)

GIBSON, J.W. SUPERVISORY CHALLENGES. COLUMBUS: MERRILL PUB. CO, 1990.

Cita MLA (9a ed.)

GIBSON, J.W. SUPERVISORY CHALLENGES. MERRILL PUB. CO, 1990.