Cita APA (7th ed.)
Alexander, M. (1961). Introduction to soil microbiology. Wiley.
Cita Chicago (17th ed.)
Alexander, Martin. Introduction to Soil Microbiology. New York: Wiley, 1961.
Cita MLA (9th ed.)
Alexander, Martin. Introduction to Soil Microbiology. Wiley, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.