Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Roelstraete, Dieter, y Sven Sörensen. Sonsbeek 9: LocusFocus. Sonsbeek, 2001.

Cita MLA (8a ed.)

Roelstraete, Dieter, y Sven Sörensen. Sonsbeek 9: LocusFocus. 2001.