Landauer, C. (1964). Contemporary economic systems: A comparative analysis. Lippincott.
Tohutoru Kātū Chicago (17th ed.)Landauer, Carl. Contemporary Economic Systems: A Comparative Analysis. Philadelphia: Lippincott, 1964.
Tohutoro MLA (9th ed.)Landauer, Carl. Contemporary Economic Systems: A Comparative Analysis. Lippincott, 1964.