Gaya APA

Snell, F, D., Snell, C, T. (1959). Colorimetric Methods of Analysis: Including Photometric Methods. Vol.IIA . New Jersey: D. Van Nostrand.

Gaya MLA

Snell, Foster, Dee., Snell, Cornelia, T. "Colorimetric Methods of Analysis: Including Photometric Methods. Vol.IIA". New Jersey: D. Van Nostrand, 1959. Text.