APA استشهاد

GREWAL.B.S. (2012). Higher engineering mathematics (42nd.). Khanna publishers.

استشهاد بنمط شيكاغو

GREWAL.B.S. Higher Engineering Mathematics. 42nd. newdelhi: Khanna publishers, 2012.

MLA استشهاد

GREWAL.B.S. Higher Engineering Mathematics. 42nd. Khanna publishers, 2012.