Παραπομπή APA

Koller, A. (1989). Work, power and efficiency. Wiley Eastern Ltd.

Παραπομπή Chicago Style

Koller, Alois. Work, Power and Efficiency. New Delhi: Wiley Eastern Ltd, 1989.

Παραπομπή MLA

Koller, Alois. Work, Power and Efficiency. Wiley Eastern Ltd, 1989.