APA

Holt M., Dienes Z., . (1973). Lets play math. New York: Walker and Company.

Chicago

Holt Michael, Dienes Zoltan, . 1973. Lets play math. New York: Walker and Company.

Harvard

Holt M., Dienes Z., . (1973). Lets play math. New York: Walker and Company.

MLA

Holt Michael, Dienes Zoltan, . Lets play math. New York: Walker and Company. 1973.