HILL, J. W. (1984). Chemistry for changing time.-- 4th ed. Macmillan Publishing.
Lua i Stíl Chicago (17ú heag.)HILL, John W. Chemistry for Changing Time.-- 4th Ed. New York: Macmillan Publishing, 1984.
Lua MLA (9ú heag.)HILL, John W. Chemistry for Changing Time.-- 4th Ed. Macmillan Publishing, 1984.
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