APA (7th ed.) Zitazioa
(1987). McGraw- Hill encylopedia of science and technology (6th ed.). Mcgraw-hill book company.
Chicago Style (17th ed.) Zitazioa
McGraw- Hill Encylopedia of Science and Technology. 6th ed. New york: Mcgraw-hill book company, 1987.
MLA (9th ed.) Zitazioa
McGraw- Hill Encylopedia of Science and Technology. 6th ed. Mcgraw-hill book company, 1987.
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