Gaya APA

Inc, M. (1987). McGraw- Hill Encyclopedia of Science & Technology Volume 18 SUR - TYR (Ed. 6). New York: McGraw-Hill Book Company.

Gaya MLA

Inc, McGraw-Hill. "McGraw- Hill Encyclopedia of Science & Technology Volume 18 SUR - TYR". Ed. 6 New York: McGraw-Hill Book Company, 1987. Text.