APA استشهاد

Baumol, W. J. (2000). Economics: Principles and policy (6th ed. 8th ed.). Dryden.

استشهاد بنمط شيكاغو

Baumol, William J. Economics: Principles and Policy. 6th ed. 8th ed. U S A: Dryden, 2000.

MLA استشهاد

Baumol, William J. Economics: Principles and Policy. 6th ed. 8th ed. Dryden, 2000.