APA-referens (7:e uppl.)

Edwards, C. W. (1963). A test of arithmetic principles, elementary form. University Microfilms.

Chicago-referens (17:e uppl.)

Edwards, Charles Walter. A Test of Arithmetic Principles, Elementary Form. [Ann Arbor, Mich: University Microfilms, 1963.

MLA-referens (9:e uppl.)

Edwards, Charles Walter. A Test of Arithmetic Principles, Elementary Form. University Microfilms, 1963.