APA (7e ed.) Bronvermelding

Sperry, L. (2004). Effective Leadership: Strategies for Maximizing Executive Productivity and Health. Brunner-Routledge.

Chicago (17e ed.) Bronvermelding

Sperry, Len. Effective Leadership: Strategies for Maximizing Executive Productivity and Health. New York: Brunner-Routledge, 2004.

MLA (9e ed.) Bronvermelding

Sperry, Len. Effective Leadership: Strategies for Maximizing Executive Productivity and Health. Brunner-Routledge, 2004.