Gaya APA

jr, W, V., lewis, G, L. (1996). introduction to hydrology (^a4 ^bJilid 1). New York: harpercollis college publisher.

Gaya MLA

jr, Warren, Viessman., lewis, Gary, L.. "introduction to hydrology". ^a4 ^bJilid 1 New York: harpercollis college publisher, 1996. Text.