APA استشهاد

Verma, C. D. (1990). Sterling general studies & general knowledge 1990 (Ed.11th rev & enl.).

استشهاد بنمط شيكاغو

Verma, C D. Sterling General Studies & General Knowledge 1990. Ed.11th rev & enl. New Delhi, Sterling, 1990.

MLA استشهاد

Verma, C D. Sterling General Studies & General Knowledge 1990. Ed.11th rev & enl. 1990.