Παραπομπή APA

Shields, L. D. (1961). Magic of creative selling. Prentice Hall.

Παραπομπή Chicago Style

Shields, L Daniel. Magic of Creative Selling. New Jersy: Prentice Hall, 1961.

Παραπομπή MLA

Shields, L Daniel. Magic of Creative Selling. Prentice Hall, 1961.