APA (7th ed.) Citation

Welfling, W. (1971). Principles of economics. McGraw-Hill.

Chicago Style (17th ed.) Citation

Welfling, Weldon. Principles of Economics. New York: McGraw-Hill, 1971.

MLA (9th ed.) Citation

Welfling, Weldon. Principles of Economics. McGraw-Hill, 1971.

Warning: These citations may not always be 100% accurate.