GREWAL, B. (1971). Higher engineering mathematics (3rd ed.). Khanna Publishers.
Chicago-viite (17. p.)GREWAL, B.S. Higher Engineering Mathematics. 3rd ed. Delhi: Khanna Publishers, 1971.
MLA-viite (9. p.)GREWAL, B.S. Higher Engineering Mathematics. 3rd ed. Khanna Publishers, 1971.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.