Παραπομπή APA

Nirupama, T. (2013). Soil Biotechnology. Black prints.

Παραπομπή Chicago Style

Nirupama, Tyagi. Soil Biotechnology. New Delhi: Black prints, 2013.

Παραπομπή MLA

Nirupama, Tyagi. Soil Biotechnology. Black prints, 2013.