Παραπομπή APA

Nigam, J. (1990). Indian Science: Era of stabilisation. Willey eastern.

Παραπομπή Chicago Style

Nigam, J.K. Indian Science: Era of Stabilisation. New Delhi: Willey eastern, 1990.

Παραπομπή MLA

Nigam, J.K. Indian Science: Era of Stabilisation. Willey eastern, 1990.