APA (7e ed.) Bronvermelding
Gill, P. (2009). Engineering drawing: Geometrical drawing (11th ed.). S.K.Kataria & Sons.
Chicago (17e ed.) Bronvermelding
Gill, P.S. Engineering Drawing: Geometrical Drawing. 11th ed. New Delhi: S.K.Kataria & Sons, 2009.
MLA (9e ed.) Bronvermelding
Gill, P.S. Engineering Drawing: Geometrical Drawing. 11th ed. S.K.Kataria & Sons, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.