APA-čujuhus (7. p.)
Turk, J., & Turk, A. (1988). Environmental science (4th ed.). Saunders College Pub..
Chicago-čujuhus (17. p.)
Turk, Jonathan, juo Amos Turk. Environmental Science. 4th ed. Philadelphia: Saunders College Pub., 1988.
MLA-čujuhus (9. p.)
Turk, Jonathan, juo Amos Turk. Environmental Science. 4th ed. Saunders College Pub., 1988.
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