Gaya APA

KEEDY, M, L., BITTINGER, M, L. (1990). DEVELOPMENTAL MATHEMATICS SECOND EDITON (2ND). Massachussetts: Addison-Wesley.

Gaya MLA

KEEDY, Mervin, L.., BITTINGER, Marvin, L.. "DEVELOPMENTAL MATHEMATICS SECOND EDITON". 2ND Massachussetts: Addison-Wesley, 1990. Textbook.