Παραπομπή APA

Martin Alexander. (1961). Introduction to soil microbiology (2.). Wiley eastern limited.

Παραπομπή Chicago Style

Martin Alexander. Introduction to Soil Microbiology. 2. New Delhi: Wiley eastern limited, 1961.

Παραπομπή MLA

Martin Alexander. Introduction to Soil Microbiology. 2. Wiley eastern limited, 1961.