APA
Tomlin K., Global Environmental Monitoring System, . (1989). Low cost monitoring for freshwaters. London: GEMS Monitoring and Assessement Research Centre, University of London.
Chicago
Tomlin K, Global Environmental Monitoring System, . 1989. Low cost monitoring for freshwaters. London: GEMS Monitoring and Assessement Research Centre, University of London.
Harvard
Tomlin K., Global Environmental Monitoring System, . (1989). Low cost monitoring for freshwaters. London: GEMS Monitoring and Assessement Research Centre, University of London.
MLA
Tomlin K, Global Environmental Monitoring System, . Low cost monitoring for freshwaters. London: GEMS Monitoring and Assessement Research Centre, University of London. 1989.