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.
Atenció: Aquestes cites poden no estar 100% correctes.