(1933). Volk an der Arbeit. Diederichs.
Cita Chicago (17th ed.)Volk an Der Arbeit. Jena: Diederichs, 1933.
Cita MLA (8th ed.)Volk an Der Arbeit. Diederichs, 1933.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)