Cita APA (7th ed.)

Roelstraete, D., & Sörensen, S. (2001). Sonsbeek 9.

Cita Chicago (17th ed.)

Roelstraete, Dieter, i Sven Sörensen. Sonsbeek 9. Arnhem, 2001.

Cita MLA (8th ed.)

Roelstraete, Dieter, i Sven Sörensen. Sonsbeek 9. 2001.