APA استشهاد

Lakshminarayanan, V. . .., & Mathur, M. L. (1989). Text book of machine drawing (7.). Jain Brothers.

استشهاد بنمط شيكاغو

Lakshminarayanan, V ., و M L. Mathur. Text Book of Machine Drawing. 7. New Delhi: Jain Brothers, 1989.

MLA استشهاد

Lakshminarayanan, V ., و M L. Mathur. Text Book of Machine Drawing. 7. Jain Brothers, 1989.