APA-čujuhus (7. p.)
Enger, E. D., & Smith, B. F. (1992). Environmental science: A study of interrelationships (4th ed.). W.C. Brown.
Chicago-čujuhus (17. p.)
Enger, Eldon D., juo Bradley F. Smith. Environmental Science: A Study of Interrelationships. 4th ed. Michigan: W.C. Brown, 1992.
MLA-čujuhus (9. p.)
Enger, Eldon D., juo Bradley F. Smith. Environmental Science: A Study of Interrelationships. 4th ed. W.C. Brown, 1992.
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