Ullrich, K. (1984). Olympia made in USA (o.A.). Dietz.
Cita Chicago (17th ed.)Ullrich, Klaus. Olympia Made in USA. o.A. Berlin: Dietz, 1984.
Cita MLA (8th ed.)Ullrich, Klaus. Olympia Made in USA. o.A. Dietz, 1984.
Atenció: Aquestes cites poden no estar 100% correctes.