Παραπομπή APA

Lewis, W. A. (1989). Principles of economic planning: A study prepared for the fahian society. Universal Book Stall.

Παραπομπή Chicago Style

Lewis, W Arthur. Principles of Economic Planning: A Study Prepared for the Fahian Society. New Delhi: Universal Book Stall, 1989.

Παραπομπή MLA

Lewis, W Arthur. Principles of Economic Planning: A Study Prepared for the Fahian Society. Universal Book Stall, 1989.