APA-referens (7:e uppl.)

Willard, H. H., & Furman, N. H. (1933). Elementary quantitative analysis: Theory and practice. D. Van Nostrand company, inc.

Chicago-referens (17:e uppl.)

Willard, Hobart Hurd, och N. Howell Furman. Elementary Quantitative Analysis: Theory and Practice. New York: D. Van Nostrand company, inc, 1933.

MLA-referens (9:e uppl.)

Willard, Hobart Hurd, och N. Howell Furman. Elementary Quantitative Analysis: Theory and Practice. D. Van Nostrand company, inc, 1933.