Cita APA (7a ed.)

Alexander, M. (1967). Introduction to soil microbiology ([4th printing].). Wiley & Sons.

Cita Chicago Style (17a ed.)

Alexander, Martin. Introduction to Soil Microbiology. [4th printing]. New York [etc.]: Wiley & Sons, 1967.

Cita MLA (9a ed.)

Alexander, Martin. Introduction to Soil Microbiology. [4th printing]. Wiley & Sons, 1967.