van Sas, N., & Witte, E. (1992). Historical research in the low countries. Den Haag: Nederlands Historisch Genootschap.
Cita Chicago (17th ed.)van Sas, N.C.F., i E. Witte. Historical Research in the Low Countries. Den Haag: Nederlands Historisch Genootschap, 1992.
Cita MLA (8th ed.)van Sas, N.C.F., i E. Witte. Historical Research in the Low Countries. Den Haag: Nederlands Historisch Genootschap, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.