Cita APA (7th ed.)

Willard, H. H. (1948). Instrumental methods of analysis. Van Nostrand.

Cita Chicago (17th ed.)

Willard, Hobart Hurd. Instrumental Methods of Analysis. New York: Van Nostrand, 1948.

Cita MLA (9th ed.)

Willard, Hobart Hurd. Instrumental Methods of Analysis. Van Nostrand, 1948.