Vontobel-Schriftenreihe. Vontobel-Stiftung.
Cita Chicago (17th ed.)Vontobel-Schriftenreihe. Zürich: Vontobel-Stiftung.
Cita MLA (8th ed.)Vontobel-Schriftenreihe. Vontobel-Stiftung.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)