Roffman, H. (1998). Three. Gmünder.
Cita Chicago (17th ed.)Roffman, Howard. Three. Berlin: Gmünder, 1998.
Cita MLA (8th ed.)Roffman, Howard. Three. Gmünder, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)