Citazione Stile APA (7a Edizione)

Webber, G. C., & Brown, J. A. 1. j. e. (1969). Number concepts and geometry. Addison-Wesley.

Citazione stile Chigago Style (17a edizione)

Webber, George Cuthbert, e John A. 1898- joint eauth Brown. Number Concepts and Geometry. Reading, Mass: Addison-Wesley, 1969.

Citatione MLA (9a ed.)

Webber, George Cuthbert, e John A. 1898- joint eauth Brown. Number Concepts and Geometry. Addison-Wesley, 1969.