APA استشهاد

Koller, A. (1979). Work, power and efficiency. Wiley eastern ltd.

استشهاد بنمط شيكاغو

Koller, Alois. Work, Power and Efficiency. New Delhi: Wiley eastern ltd, 1979.

MLA استشهاد

Koller, Alois. Work, Power and Efficiency. Wiley eastern ltd, 1979.