Cita APA (7th ed.)
Copeland, R. W. (1982). Mathematics and the elementary teacher (4th ed.). Macmillan.
Cita Chicago (17th ed.)
Copeland, Richard W. Mathematics and the Elementary Teacher. 4th ed. New York: Macmillan, 1982.
Cita MLA (9th ed.)
Copeland, Richard W. Mathematics and the Elementary Teacher. 4th ed. Macmillan, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.