APA引文

William Boyes & Michael Melvin. (1991). Economics. Houghton Mifflin.

Chicago Edition Citation

William Boyes and Michael Melvin. Economics. Boston: Houghton Mifflin, 1991.

MLA引文

William Boyes and Michael Melvin. Economics. Houghton Mifflin, 1991.

警告：这些引文格式不一定是100％准确.