Cita APA (7th ed.)
Willard, H. H. (1940). Elementary quantitative analysis: Theory and practice. Van Nostrand.
Cita Chicago (17th ed.)
Willard, Hobart H. Elementary Quantitative Analysis: Theory and Practice. Nueva York, EUA: Van Nostrand, 1940.
Cita MLA (9th ed.)
Willard, Hobart H. Elementary Quantitative Analysis: Theory and Practice. Van Nostrand, 1940.
Atenció: Aquestes cites poden no estar 100% correctes.