Turk, J., Arms, K., & Turk, A. (1984). Environmental science (3rd ed.). Saunders College Pub..
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Dyfyniad Arddull Chicago
Turk, Jonathan, Karen Arms, and Amos Turk. Environmental Science. 3rd ed. Philadelphia: Saunders College Pub., 1984.
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Dyfyniad MLA
Turk, Jonathan, et al. Environmental Science. 3rd ed. Saunders College Pub., 1984.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.