Gaya APA

Levy, N., Levy, J, U. (1990). Essential Math: for Colege-Bound Students (Ed. 1.Cet.1.--). New Yok: Simon & Schuster.

Gaya MLA

Levy, Norman., Levy, Joan, U.. "Essential Math: for Colege-Bound Students". Ed. 1.Cet.1.-- New Yok: Simon & Schuster, 1990. Text.