De Wulf, R. 374/1.1: Briefwisseling & reeksen kabinetsnota's.
Cita Chicago (17th ed.)De Wulf, Roger. 374/1.1: Briefwisseling & Reeksen Kabinetsnota's.
Cita MLA (8th ed.)De Wulf, Roger. 374/1.1: Briefwisseling & Reeksen Kabinetsnota's.
Atenció: Aquestes cites poden no estar 100% correctes.