APA (7th ed.) Citation

Richards, B. N. (1974). Introduction to the soil ecosystem. Longman.

Chicago Style (17th ed.) Citation

Richards, B. N. Introduction to the Soil Ecosystem. Harlow, Essex: Longman, 1974.

MLA (9th ed.) Citation

Richards, B. N. Introduction to the Soil Ecosystem. Longman, 1974.

Warning: These citations may not always be 100% accurate.