Simpson, W. D. (1978). Bothwell Castle: (official guide) (2nd ed.). Her Majesty's Stationary Office.
Chicago-Zitierstil (17. Ausg.)Simpson, William Douglas. Bothwell Castle: (official Guide). 2nd ed. Edinburgh: Her Majesty's Stationary Office, 1978.
MLA-Zitierstil (9. Ausg.)Simpson, William Douglas. Bothwell Castle: (official Guide). 2nd ed. Her Majesty's Stationary Office, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.