Cita APA (7th ed.)

HUMPHREY B. (2000). 21ST CENTURY SUPERVISOR: NINE ESSENTIAL SKILLS FOR FRONTLINE LEADERS. JOSSEY-BASS PUBLICATIONS.

Cita Chicago (17th ed.)

HUMPHREY B. 21ST CENTURY SUPERVISOR: NINE ESSENTIAL SKILLS FOR FRONTLINE LEADERS. SAN FRANCISCO: JOSSEY-BASS PUBLICATIONS, 2000.

Cita MLA (9th ed.)

HUMPHREY B. 21ST CENTURY SUPERVISOR: NINE ESSENTIAL SKILLS FOR FRONTLINE LEADERS. JOSSEY-BASS PUBLICATIONS, 2000.