APA (7th ed.) Citation

Wragg, E. C. (1999). An introduction to classroom observation (2nd ed.). Routledge.

Chicago Style (17th ed.) Citation

Wragg, E. C. An Introduction to Classroom Observation. 2nd ed. London ; New York: Routledge, 1999.

MLA (9th ed.) Citation

Wragg, E. C. An Introduction to Classroom Observation. 2nd ed. Routledge, 1999.