Motz, R. (1942). Thirty questions about Belgium. London: Lincolns-Prager.
Cita Chicago (17th ed.)Motz, Roger. Thirty Questions About Belgium. London: Lincolns-Prager, 1942.
Cita MLA (8th ed.)Motz, Roger. Thirty Questions About Belgium. London: Lincolns-Prager, 1942.
Atenció: Aquestes cites poden no estar 100% correctes.