Cita APA (7th ed.)

Purnell, H. (1962). Gas, chromatography. John Wiley & Sons.

Cita Chicago (17th ed.)

Purnell, Howard. Gas, Chromatography. New York: John Wiley & Sons, 1962.

Cita MLA (9th ed.)

Purnell, Howard. Gas, Chromatography. John Wiley & Sons, 1962.