Παραπομπή APA

Gill, P. (2009). Textbook of engineering drawing: Geometrical drawing (11th ed.). S.K. Kataria.

Παραπομπή Chicago Style

Gill, P.S. Textbook of Engineering Drawing: Geometrical Drawing. 11th ed. New Delhi: S.K. Kataria, 2009.

Παραπομπή MLA

Gill, P.S. Textbook of Engineering Drawing: Geometrical Drawing. 11th ed. S.K. Kataria, 2009.