APA

Brainerd C. J., . (1979). The origins of the number concept. New York [u.a.]: Praeger.

Chicago

Brainerd Charles J, . 1979. The origins of the number concept. New York [u.a.]: Praeger.

Harvard

Brainerd C. J., . (1979). The origins of the number concept. New York [u.a.]: Praeger.

MLA

Brainerd Charles J, . The origins of the number concept. New York [u.a.]: Praeger. 1979.