APA

Sprent J. I., . (1979). The Biology of nitrogen-fixing organisms. London: McGraw-Hill Book Company.

Chicago

Sprent Janet I, . 1979. The Biology of nitrogen-fixing organisms. London: McGraw-Hill Book Company.

Harvard

Sprent J. I., . (1979). The Biology of nitrogen-fixing organisms. London: McGraw-Hill Book Company.

MLA

Sprent Janet I, . The Biology of nitrogen-fixing organisms. London: McGraw-Hill Book Company. 1979.