APA (7th ed.) Citation
Witter, E., Mårtensson, A., & Garcia, F. (1993). Size of the soil microbial biomass in a long-term field experiment as affected by different n-fertilizers and organic manures. Elsevier.
Chicago Style (17th ed.) Citation
Witter, E., A.M Mårtensson, and F.V Garcia. Size of the Soil Microbial Biomass in a Long-term Field Experiment as Affected by Different N-fertilizers and Organic Manures. Elsevier, 1993.
MLA (9th ed.) Citation
Witter, E., et al. Size of the Soil Microbial Biomass in a Long-term Field Experiment as Affected by Different N-fertilizers and Organic Manures. Elsevier, 1993.
Warning: These citations may not always be 100% accurate.