Παραπομπή APA

Sinha, R. (1975). Introduction to geology. Vikas Publishing House Pvt. Ltd.

Παραπομπή Chicago Style

Sinha, R.K. Introduction to Geology. Delhi: Vikas Publishing House Pvt. Ltd, 1975.

Παραπομπή MLA

Sinha, R.K. Introduction to Geology. Vikas Publishing House Pvt. Ltd, 1975.