Cita APA (7a ed.)

Husén, T. (1967). International study of achievement in mathematics: A comparison of twelve countries. 2. Almqvist & Wiksell [etc.].

Cita Chicago Style (17a ed.)

Husén, Torsten. International Study of Achievement in Mathematics: A Comparison of Twelve Countries. 2. Stockholm [etc.]: Almqvist & Wiksell [etc.], 1967.

Cita MLA (9a ed.)

Husén, Torsten. International Study of Achievement in Mathematics: A Comparison of Twelve Countries. 2. Almqvist & Wiksell [etc.], 1967.