APA (7th ed.) Citation

Politzer, R. L., & Weiss, L. (1969). Improving achievement in foreign language. Center for Curriculum Development.

Chicago Style (17th ed.) Citation

Politzer, Robert L., and Louis Weiss. Improving Achievement in Foreign Language. Philadelphia: Center for Curriculum Development, 1969.

MLA (8th ed.) Citation

Politzer, Robert L., and Louis Weiss. Improving Achievement in Foreign Language. Center for Curriculum Development, 1969.