APA استشهاد

Heerkens,Gary R. (2003). Project management. Tata McGraw Hill.

استشهاد بنمط شيكاغو

Heerkens,Gary R. Project Management. New Delhi: Tata McGraw Hill, 2003.

MLA استشهاد

Heerkens,Gary R. Project Management. Tata McGraw Hill, 2003.