Παραπομπή APA

Pilditch, J. (1961). The silent salesman: How to develop packing that sells. Business publications.

Παραπομπή Chicago Style

Pilditch, James. The Silent Salesman: How to Develop Packing That Sells. London: Business publications, 1961.

Παραπομπή MLA

Pilditch, James. The Silent Salesman: How to Develop Packing That Sells. Business publications, 1961.