Hemstock, H. F., & Costelloe, P. (1969). Modern business arithmetic (3rd ed.). Nelson.
芝加哥风格引文Hemstock, H. F., 与 P.J Costelloe. Modern Business Arithmetic. 3rd ed. [S.l.]: Nelson, 1969.
MLA引文Hemstock, H. F., 与 P.J Costelloe. Modern Business Arithmetic. 3rd ed. Nelson, 1969.
警告：这些引文格式不一定是100％准确.