APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Husén, Torsten. International Study of Achievement in Mathematics: A Comparison of Twelve Countries. Stockholm : New York: Almqvist & Wiksell, 1967.

MLA (9th ed.) Citation

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