Welch, P. J., & Welch, G. F. Economics: Theory and practice (5th ed.). Dryden.
Chicago Style (17th ed.) CitationWelch, Patrick J., and Gerry F. Welch. Economics: Theory and Practice. 5th ed. Chicago: Dryden.
MLA引文Welch, Patrick J., and Gerry F. Welch. Economics: Theory and Practice. 5th ed. Dryden.
警告:這些引文格式不一定是100%准確.