Παραπομπή APA

Culcutta: Indian Society of Earth Sciences. (1991). Indian Journal of Earth Sciences, vol.18(1-4).

Παραπομπή Chicago Style

Culcutta: Indian Society of Earth Sciences. Indian Journal of Earth Sciences, Vol.18(1-4). Culcutta: Indian Society of Earth Sciences, 1991.

Παραπομπή MLA

Culcutta: Indian Society of Earth Sciences. Indian Journal of Earth Sciences, Vol.18(1-4). 1991.