APA

Holt M., Dienes Z. P. c., . (1973). Let's play math / Michael Holt and Zoltan Dienes. [London]: Penguin Books.

Chicago

Holt Michael, Dienes Zoltan Paul coaut, . 1973. Let's play math / Michael Holt and Zoltan Dienes. [London]: Penguin Books.

Harvard

Holt M., Dienes Z. P. c., . (1973). Let's play math / Michael Holt and Zoltan Dienes. [London]: Penguin Books.

MLA

Holt Michael, Dienes Zoltan Paul coaut, . Let's play math / Michael Holt and Zoltan Dienes. [London]: Penguin Books. 1973.