Cita APA (7th ed.)

(2001). Sonsbeek 9: Locusfocus.

Cita Chicago (17th ed.)

Sonsbeek 9: Locusfocus. Arnhem, 2001.

Cita MLA (8th ed.)

Sonsbeek 9: Locusfocus. 2001.

Atenció: Aquestes cites poden no estar 100% correctes.