Singh, S. (2018). Biogeography. Pravalika publications.
Cita Chicago (17th ed.)Singh, Savindra. Biogeography. Allahbad, India: Pravalika publications, 2018.
Cita MLA (9th ed.)Singh, Savindra. Biogeography. Pravalika publications, 2018.
Atenció: Aquestes cites poden no estar 100% correctes.