Gaya APA

Swanson, C, P., May, L, J. (1970). Teaching mathematics in the elementary school . New York: New York: The Free Press; 1970.

Gaya MLA

Swanson, Carl, P.., May, Lola, June. "Teaching mathematics in the elementary school". New York: New York: The Free Press; 1970, 1970. Text.