APA-čujuhus (7. p.)
Spellman, F. R., & Price-Bayer, J. (2012). The handbook of nature. Government Institutes.
Chicago-čujuhus (17. p.)
Spellman, Frank R., juo Joni Price-Bayer. The Handbook of Nature. Lanham, Md.: Government Institutes, 2012.
MLA-čujuhus (9. p.)
Spellman, Frank R., juo Joni Price-Bayer. The Handbook of Nature. Government Institutes, 2012.
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