Ponting, G., Ponting, M., & Curtis, G. R. (1984). The stones around Callanish: A guide to the minor megalithic sites of the Callanish area.
Chicago-Zitierstil (17. Ausg.)Ponting, Gerald, Margaret Ponting, und G. R. Curtis. The Stones Around Callanish: A Guide to the Minor Megalithic Sites of the Callanish Area. Callanish, 1984.
MLA-Zitierstil (9. Ausg.)Ponting, Gerald, et al. The Stones Around Callanish: A Guide to the Minor Megalithic Sites of the Callanish Area. 1984.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.