APA-čujuhus (7. p.)
Purves, W. K., & Orians,Gordon H. (1987). Life: The science of biology (2nd ed.). Sinauer.
Chicago-čujuhus (17. p.)
Purves, William K., juo Orians,Gordon H. Life: The Science of Biology. 2nd ed. Massachusetts: Sinauer, 1987.
MLA-čujuhus (9. p.)
Purves, William K., juo Orians,Gordon H. Life: The Science of Biology. 2nd ed. Sinauer, 1987.
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