APA-ийн эшлэл(7 дахь хэвлэлт)

Koch, P. (2010). Water sources (4th ed.). American Water Works Association.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Koch, Paul. Water Sources. 4th ed. Denver, Colo.: American Water Works Association, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Koch, Paul. Water Sources. 4th ed. American Water Works Association, 2010.