Cita APA (7a ed.)

Wragg, E. C. (1994). An introduction to classroom observation. Routledge.

Cita Chicago Style (17a ed.)

Wragg, E. C. An Introduction to Classroom Observation. London [etc.]: Routledge, 1994.

Cita MLA (9a ed.)

Wragg, E. C. An Introduction to Classroom Observation. Routledge, 1994.