APA (7e ed.) Bronvermelding

Wills, J. C. (1997). Strategic planning: The ASTD trainer's sourcebook. McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Wills, John C. Strategic Planning: The ASTD Trainer's Sourcebook. New York: McGraw-Hill, 1997.

MLA (9e ed.) Bronvermelding

Wills, John C. Strategic Planning: The ASTD Trainer's Sourcebook. McGraw-Hill, 1997.