Johnson, G. B. (2013). Essentials of the living world (4th ed.). McGraw-Hill.
Chicago-čujuhus (17. p.)Johnson, George B. Essentials of the Living World. 4th ed. New York, NY: McGraw-Hill, 2013.
MLA-čujuhus (9. p.)Johnson, George B. Essentials of the Living World. 4th ed. McGraw-Hill, 2013.
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