Zemach, E. M. (1966). Three modes of being. St. Patrick's College.
Cita Chicago (17th ed.)Zemach, Eddy M. Three Modes of Being. Maynooth: St. Patrick's College, 1966.
Cita MLA (8th ed.)Zemach, Eddy M. Three Modes of Being. St. Patrick's College, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.