APA-ийн эшлэл(7 дахь хэвлэлт)

Enger, E. D., & Smith, B. F. (2010). Environmental science: A study of interrelationships (12th ed.). McGraw-Hill.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Enger, Eldon D., ба Bradley F. Smith. Environmental Science: A Study of Interrelationships. 12th ed. Boston: McGraw-Hill, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Enger, Eldon D., ба Bradley F. Smith. Environmental Science: A Study of Interrelationships. 12th ed. McGraw-Hill, 2010.