MLA

Parmar, Nagina, and Ajay Singh. Geomicrobiology and Biogeochemistry. Springer Berlin Heidelberg, 2014.

APA

Parmar, N., & Singh, A. (2014). Geomicrobiology and Biogeochemistry. Springer Berlin Heidelberg.

Chicago

Parmar, Nagina, and Ajay Singh. Geomicrobiology and Biogeochemistry. : Springer Berlin Heidelberg, 2014.