APA (7th ed.) Citation

Ritchie, A., Ritchie, G., & Ashmore, P. (1995). The ancient monuments of Orkney / Anna Ritchie and Graham Ritchie, edited by Patrick Ashmore ((New ed.).). HMSO.

Chicago Style (17th ed.) Citation

Ritchie, Anna, Graham Ritchie, and Patrick Ashmore. The Ancient Monuments of Orkney / Anna Ritchie and Graham Ritchie, Edited by Patrick Ashmore. (New ed.). Edinburgh: HMSO, 1995.

MLA (9th ed.) Citation

Ritchie, Anna, et al. The Ancient Monuments of Orkney / Anna Ritchie and Graham Ritchie, Edited by Patrick Ashmore. (New ed.). HMSO, 1995.

Warning: These citations may not always be 100% accurate.