Welfare, A. (2010). Great crowns stone: The recumbent stone circles of North-East Scotland. RCAHMS.
Chicago-Zitierstil (17. Ausg.)Welfare, Adam. Great Crowns Stone: The Recumbent Stone Circles of North-East Scotland. Edinburgh: RCAHMS, 2010.
MLA-Zitierstil (9. Ausg.)Welfare, Adam. Great Crowns Stone: The Recumbent Stone Circles of North-East Scotland. RCAHMS, 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.