Mathur, S., B.(1977).A textbook of engineering drawing in first angle projections: according to the latest B.I.S. Specification SP: 46-1988 (-).Purwokerto:.
Gaya MLA
Mathur, S., B..A textbook of engineering drawing in first angle projections: according to the latest B.I.S. Specification SP: 46-1988.-Purwokerto:,1977.Text.