APA (7th ed.) Citation

Simpson, D. D. A., Murphy, E. M., & Gregory, R. A. (2006). Excavations at Northton, Isle of Harris. Archaeopress.

Chicago Style (17th ed.) Citation

Simpson, Derek Douglas Alexander, Eileen M. Murphy, and Richard A. Gregory. Excavations at Northton, Isle of Harris. Oxford: Archaeopress, 2006.

MLA (9th ed.) Citation

Simpson, Derek Douglas Alexander, et al. Excavations at Northton, Isle of Harris. Archaeopress, 2006.