Keren, T. (1984). Sophie Udin: Portrait of a pioneer.
Cita Chicago (17th ed.)Keren, Thea. Sophie Udin: Portrait of a Pioneer. Rehovot/Israel, 1984.
Cita MLA (8th ed.)Keren, Thea. Sophie Udin: Portrait of a Pioneer. 1984.
Atenció: Aquestes cites poden no estar 100% correctes.