Cita APA (7a ed.)

Westhof, J. Western European Union. Guyot.

Cita Chicago Style (17a ed.)

Westhof, Jacques. Western European Union. Brussels: Guyot.

Cita MLA (9a ed.)

Westhof, Jacques. Western European Union. Guyot.

警告：這些引文格式不一定是100％准確.