Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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