Lua APA (7ú heag.)
Guinness, A. E. (1977). Joy of nature: How to observe and appreciate the great outdoors. Reader's Digest Association.
Lua i Stíl Chicago (17ú heag.)
Guinness, Alma E. Joy of Nature: How to Observe and Appreciate the Great Outdoors. Pleasantville, N.Y.: Reader's Digest Association, 1977.
Lua MLA (9ú heag.)
Guinness, Alma E. Joy of Nature: How to Observe and Appreciate the Great Outdoors. Reader's Digest Association, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.