APA
Litchfield C. D., Seyfried P. L., . (1979). Methodology for Biomass Determinations and Microbial Activities in Sediments: A Symposium by ASTM. Ft. Lauderdale, Fa. 30-31. 01. 1998. Philadelphia: American Society for Testing and Materials.
Chicago
Litchfield C D, Seyfried P L, . 1979. Methodology for Biomass Determinations and Microbial Activities in Sediments: A Symposium by ASTM. Ft. Lauderdale, Fa. 30-31. 01. 1998. Philadelphia: American Society for Testing and Materials.
Harvard
Litchfield C. D., Seyfried P. L., . (1979). Methodology for Biomass Determinations and Microbial Activities in Sediments: A Symposium by ASTM. Ft. Lauderdale, Fa. 30-31. 01. 1998. Philadelphia: American Society for Testing and Materials.
MLA
Litchfield C D, Seyfried P L, . Methodology for Biomass Determinations and Microbial Activities in Sediments: A Symposium by ASTM. Ft. Lauderdale, Fa. 30-31. 01. 1998. Philadelphia: American Society for Testing and Materials. 1979.