Cita APA (7a ed.)

Butt, R. V. (1969). Sales effort and marketing strategy: A systems approach. American Management Association.

Cita Chicago Style (17a ed.)

Butt, Richard V. Sales Effort and Marketing Strategy: A Systems Approach. New York: American Management Association, 1969.

Cita MLA (9a ed.)

Butt, Richard V. Sales Effort and Marketing Strategy: A Systems Approach. American Management Association, 1969.