Gaya APA

Swenson, E, J., Swanson, C, P. (1973). Teaching mathematics to schildren . New York: New York: Macmillan; 1973.

Gaya MLA

Swenson, Esther, J., Swanson, Carl, P.. "Teaching mathematics to schildren". New York: New York: Macmillan; 1973, 1973. Text.