Gaya APA

Swanson, C, P., Copeland, R, W. (1967). Mathematics and the elementary teacher . Philadelphia: Philadelphia: W.B. Saunders; 1967.

Gaya MLA

Swanson, Carl, P.., Copeland, Richard, W. "Mathematics and the elementary teacher". Philadelphia: Philadelphia: W.B. Saunders; 1967, 1967. Text.