Cita APA (7a ed.)

Opitz, H. (2006). International Music Directory 2006/2007. Saur.

Cita Chicago Style (17a ed.)

Opitz, Helmut. International Music Directory 2006/2007. München: Saur, 2006.

Cita MLA (8a ed.)

Opitz, Helmut. International Music Directory 2006/2007. Saur, 2006.