APA (7th ed.) Citation

Bull, S., Brna, P., & Pain, H. (1995). Extending the scope of the student model.

Chicago Style (17th ed.) Citation

Bull, Susan, Paul Brna, and Helen Pain. Extending the Scope of the Student Model. Edinburgh, 1995.

MLA (9th ed.) Citation

Bull, Susan, et al. Extending the Scope of the Student Model. 1995.