Cita APA (7a ed.)
Husen, T., & Husen, T. (1967). International study of achievement in mathematics: A comparison of twelve contries.
Cita estilo Chicago (17a ed.)
Husen, Torsten, y Torsten Husen. International Study of Achievement in Mathematics: A Comparison of Twelve Contries. 1967.
Cita MLA (9a ed.)
Husen, Torsten, y Torsten Husen. International Study of Achievement in Mathematics: A Comparison of Twelve Contries. 1967.
Precaución: Estas citas no son 100% exactas.