APA
Courant R, Courant R. & Robbins H, . (1996). What Is Mathematics. : Oxford.
Chicago
Courant R, Courant R. & Robbins H, . 1996. What Is Mathematics. : Oxford.
Harvard
Courant R, Courant R. & Robbins H, . (1996). What Is Mathematics. : Oxford.
MLA
Courant R, Courant R. & Robbins H, . What Is Mathematics. : Oxford. 1996.
