Παραπομπή σε μορφή APA (7η εκδ.)

Walker, A. (1873). The science of wealth: A manual of political economy, embracing the laws of trade, currency and finance (2d ed.). J.B. Lippincott.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Walker, Amasa. The Science of Wealth: A Manual of Political Economy, Embracing the Laws of Trade, Currency and Finance. 2d ed. Philadelphia: J.B. Lippincott, 1873.

Παραπομπή σε μορφή MLA (8th εκδ.)

Walker, Amasa. The Science of Wealth: A Manual of Political Economy, Embracing the Laws of Trade, Currency and Finance. 2d ed. J.B. Lippincott, 1873.