Παραπομπή APA

Gupta, N. .., & Gurjar, R. K. (1993). Sustainable development. Rawat publications.

Παραπομπή Chicago Style

Gupta, N. .L, και R. K.,ed Gurjar. Sustainable Development. Jaipur: Rawat publications, 1993.

Παραπομπή MLA

Gupta, N. .L, και R. K.,ed Gurjar. Sustainable Development. Rawat publications, 1993.