Gaya APA

Willard, H, H, (. (1974). Instrumental Methods of Analysis, 5th-Ed . New York: D. VAN NOSTRAND COMPANY.

Gaya MLA

Willard, Hobart, H, (A.O). "Instrumental Methods of Analysis, 5th-Ed". New York: D. VAN NOSTRAND COMPANY, 1974. Text.