APA (7e ed.) Bronvermelding

Vrat, P., Sardana, G. D., & Sahay, B. S. (1998). Productivity management: A systems approach. Narosa Pub.

Chicago (17e ed.) Bronvermelding

Vrat, Prem, G. D. Sardana, en B. S. Sahay. Productivity Management: A Systems Approach. New Delhi: Narosa Pub, 1998.

MLA (8e ed.) Bronvermelding

Vrat, Prem, et al. Productivity Management: A Systems Approach. Narosa Pub, 1998.