Cita APA (7th ed.)

Streefland, L. (1993). The legacy of Hans Freudenthal. Kluwer Academic Publishers.

Cita Chicago (17th ed.)

Streefland, Leen. The Legacy of Hans Freudenthal. Dordrecht: Kluwer Academic Publishers, 1993.

Cita MLA (9th ed.)

Streefland, Leen. The Legacy of Hans Freudenthal. Kluwer Academic Publishers, 1993.