APA

Alexander M., . (1977). Introduction to soil microbiology. New York: John Wiley & Sons.

Chicago

Alexander Martin, . 1977. Introduction to soil microbiology. New York: John Wiley & Sons.

Harvard

Alexander M., . (1977). Introduction to soil microbiology. New York: John Wiley & Sons.

MLA

Alexander Martin, . Introduction to soil microbiology. New York: John Wiley & Sons. 1977.