Citazione Stile APA (7a Edizione)

Nigam, V. N., & Dhoundial, M. (1998). A complete course in certificate geography (6., rev. ed.). Pitambar Publ.

Citazione stile Chigago Style (17a edizione)

Nigam, V. N., e M. Dhoundial. A Complete Course in Certificate Geography. 6., rev. ed. New Delhi: Pitambar Publ, 1998.

Citatione MLA (9a ed.)

Nigam, V. N., e M. Dhoundial. A Complete Course in Certificate Geography. 6., rev. ed. Pitambar Publ, 1998.