APA (7th ed.) Citation

Stigler & Hiebert. (2009). The teaching gap: Best ideas from the world's teachers for improving education in the classroom. Free Press.

Chicago Style (17th ed.) Citation

Stigler and Hiebert. The Teaching Gap: Best Ideas from the World's Teachers for Improving Education in the Classroom. New York: Free Press, 2009.

MLA (8th ed.) Citation

Stigler and Hiebert. The Teaching Gap: Best Ideas from the World's Teachers for Improving Education in the Classroom. Free Press, 2009.