APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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