Cita APA (7th ed.)

Willerding, M. F. (1966). Elementary mathematics: Its structure and concepts. Wiley.

Cita Chicago (17th ed.)

Willerding, Margaret F. Elementary Mathematics: Its Structure and Concepts. New York: Wiley, 1966.

Cita MLA (9th ed.)

Willerding, Margaret F. Elementary Mathematics: Its Structure and Concepts. Wiley, 1966.