APA استشهاد

Gill, P. S. (2004). A Textbook of machine drawing. S K Kataria & Sons.

استشهاد بنمط شيكاغو

Gill, P S. A Textbook of Machine Drawing. Delhi: S K Kataria & Sons, 2004.

MLA استشهاد

Gill, P S. A Textbook of Machine Drawing. S K Kataria & Sons, 2004.