Freudenthal, H. (1983). Didactical phenomenology of mathematical structures. Kluwer Academic.
Cita Chicago (17th ed.)Freudenthal, Hans. Didactical Phenomenology of Mathematical Structures. Boston: Kluwer Academic, 1983.
Cita MLA (9th ed.)Freudenthal, Hans. Didactical Phenomenology of Mathematical Structures. Kluwer Academic, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.