Cita APA

Donaldson, L. (1978). Psychological Leverage: How to use it to double your personal power. Parker Pub Company.

Citación estilo Chicago

Donaldson, Les. Psychological Leverage: How to Use It to Double Your Personal Power. New York: Parker Pub Company, 1978.

Cita MLA

Donaldson, Les. Psychological Leverage: How to Use It to Double Your Personal Power. Parker Pub Company, 1978.