Gaya APA

Inc., M. (1971). Encyclopedia of science and technology. Volume 13. Spir Tou (1971). : New York : McGraw-Hill Book Co.,.

Gaya MLA

Inc., McGraw-Hill. "Encyclopedia of science and technology. Volume 13. Spir Tou". 1971 : New York : McGraw-Hill Book Co.,, 1971. Text.