APA (7th ed.) Citation

Husén, T. (1967). International study of achievement in mathematics: A comparison of twelve countries. 1. Almqvist & Wiksell [etc.].

Chicago Style (17th ed.) Citation

Husén, Torsten. International Study of Achievement in Mathematics: A Comparison of Twelve Countries. 1. Stockholm [etc.]: Almqvist & Wiksell [etc.], 1967.

MLA (9th ed.) Citation

Husén, Torsten. International Study of Achievement in Mathematics: A Comparison of Twelve Countries. 1. Almqvist & Wiksell [etc.], 1967.