APA (7th ed.) Citation

Walker, N. (1975). Soil microbiology. Butterworths.

Chicago Style (17th ed.) Citation

Walker, Norman. Soil Microbiology. London: Butterworths, 1975.

MLA (9th ed.) Citation

Walker, Norman. Soil Microbiology. Butterworths, 1975.

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