ORTELL, E. C., & SMITH, S. M. (1973). Arithmetic: Beginning math for college student. Holbrook Press.

ORTELL, Edward C., and Sanderson M. SMITH. Arithmetic: Beginning Math for College Student. Boston: Holbrook Press, 1973.

ORTELL, Edward C., and Sanderson M. SMITH. Arithmetic: Beginning Math for College Student. Holbrook Press, 1973.