Cita APA (7a ed.)

Hemstock, H. F., & Costelloe, P. (1969). Modern business arithmetic (3rd ed.). Nelson.

Cita Chicago Style (17a ed.)

Hemstock, H. F., y P.J Costelloe. Modern Business Arithmetic. 3rd ed. [S.l.]: Nelson, 1969.

Cita MLA (9a ed.)

Hemstock, H. F., y P.J Costelloe. Modern Business Arithmetic. 3rd ed. Nelson, 1969.