APA (7th ed.) Citation

Welch, P. J., & Welch, G. F. Economics: Theory and practice (5th ed.). Dryden.

Chicago Style (17th ed.) Citation

Welch, Patrick J., and Gerry F. Welch. Economics: Theory and Practice. 5th ed. Chicago: Dryden.

MLA (9th ed.) Citation

Welch, Patrick J., and Gerry F. Welch. Economics: Theory and Practice. 5th ed. Dryden.