APA (7th ed.) Citation

Willsmer, R. L. (1975). Directing the marketing effort (Revised and slightly abridged ed.). Pan Books.

Chicago Style (17th ed.) Citation

Willsmer, Ray L. Directing the Marketing Effort. Revised and slightly abridged ed. London: Pan Books, 1975.

MLA (8th ed.) Citation

Willsmer, Ray L. Directing the Marketing Effort. Revised and slightly abridged ed. Pan Books, 1975.