APA (7th ed.) Citation

Grenfell, M., & Harris, V. (1999). Modern languages and learning strategies: In theory and practice. Routledge.

Chicago Style (17th ed.) Citation

Grenfell, Michael, and Vee Harris. Modern Languages and Learning Strategies: In Theory and Practice. London ; New York: Routledge, 1999.

MLA (9th ed.) Citation

Grenfell, Michael, and Vee Harris. Modern Languages and Learning Strategies: In Theory and Practice. Routledge, 1999.