Παραπομπή APA

Kranz, R., & Kranz, M. (1980). Professional selling, a practical approach. Van Nostrand.

Παραπομπή Chicago Style

Kranz, R.J, και M.K Kranz. Professional Selling, a Practical Approach. New York: Van Nostrand, 1980.

Παραπομπή MLA

Kranz, R.J, και M.K Kranz. Professional Selling, a Practical Approach. Van Nostrand, 1980.