Παραπομπή APA

Herzberg, E., & Nicholson, M. (1952). Training for retail sales staff. sir Isaac Pitman&sons.

Παραπομπή Chicago Style

Herzberg, Else, και Mary Nicholson. Training for Retail Sales Staff. London: sir Isaac Pitman&sons, 1952.

Παραπομπή MLA

Herzberg, Else, και Mary Nicholson. Training for Retail Sales Staff. sir Isaac Pitman&sons, 1952.