APA Style

Survey, G, B, O. (19--?). Scotland : Indexes to the 1/2500 and 6-inch scale maps and small specimens of different maps published . London: University of California Libraries.

MLA Style

Survey, Great, Britain., Ordnance. "Scotland : Indexes to the 1/2500 and 6-inch scale maps and small specimens of different maps published". London: University of California Libraries, 19--?. Text.