APA-čujuhus (7. p.)
Guinness, A. E. (1977). Joy of nature: How to observe and appreciate the great outdoors. Reader's Digest Association.
Chicago-čujuhus (17. p.)
Guinness, Alma E. Joy of Nature: How to Observe and Appreciate the Great Outdoors. Pleasantville, N.Y.: Reader's Digest Association, 1977.
MLA-čujuhus (9. p.)
Guinness, Alma E. Joy of Nature: How to Observe and Appreciate the Great Outdoors. Reader's Digest Association, 1977.
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