APA (7th ed.) Citation

Froman, L. A. (1947). Principles of economics (rev. ed., [5th printing].). Irwin.

Chicago Style (17th ed.) Citation

Froman, Lewis A. Principles of Economics. rev. ed., [5th printing]. Chicago: Irwin, 1947.

MLA (9th ed.) Citation

Froman, Lewis A. Principles of Economics. rev. ed., [5th printing]. Irwin, 1947.