Cita APA (7th ed.)
(1987). McGraw- Hill encylopedia of science and technology (6th ed.). Mcgraw-hill book company.
Cita Chicago (17th ed.)
McGraw- Hill Encylopedia of Science and Technology. 6th ed. New york: Mcgraw-hill book company, 1987.
Cita MLA (9th ed.)
McGraw- Hill Encylopedia of Science and Technology. 6th ed. Mcgraw-hill book company, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.