APA (7th ed.) Citation

ScienceDirect (Online service), Williams, P., Ketley, J. M., & Salmond, G. (1998). Methods in microbiology. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Peter Williams, Julian M. Ketley, and George Salmond. Methods in Microbiology. London ; New York: Academic Press, 1998.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Methods in Microbiology. Academic Press, 1998.