Ritter, J. (1980). L - Mn. Schwabe.
Cita Chicago (17th ed.)Ritter, Joachim. L - Mn. Basel: Schwabe, 1980.
Cita MLA (8th ed.)Ritter, Joachim. L - Mn. Schwabe, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)