ebrary, Inc. (1995). Ward Valley: An examination of seven issues in earth sciences and ecology. National Academy Press.
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Chicago Style (17th ed.) Zitazioa
ebrary, Inc. Ward Valley: An Examination of Seven Issues in Earth Sciences and Ecology. Washington, DC: National Academy Press, 1995.
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MLA (9th ed.) Zitazioa
ebrary, Inc. Ward Valley: An Examination of Seven Issues in Earth Sciences and Ecology. National Academy Press, 1995.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.