Παραπομπή APA

Jeffries, A. A., & Duxfield, T. (1969). Management and training of technical salesmen. Gower press.

Παραπομπή Chicago Style

Jeffries, A. A., και T.S Duxfield. Management and Training of Technical Salesmen. London: Gower press, 1969.

Παραπομπή MLA

Jeffries, A. A., και T.S Duxfield. Management and Training of Technical Salesmen. Gower press, 1969.