APA استشهاد

Gill,P.S. (2002). Text book of engineering drawing: Geometrical drawing (11th ed.). S.K.Kataria.

استشهاد بنمط شيكاغو

Gill,P.S. Text Book of Engineering Drawing: Geometrical Drawing. 11th ed. New Delhi: S.K.Kataria, 2002.

MLA استشهاد

Gill,P.S. Text Book of Engineering Drawing: Geometrical Drawing. 11th ed. S.K.Kataria, 2002.