Ordnance Survey of Scotland, Dornoch and Cromarty, Sheet 9.
MLA
Ordnance Survey of Scotland, Dornoch and Cromarty, Sheet 9. Ordnance Survey Office, 1913. https://collections.library.yale.edu/catalog/15826806.
APA, 6th edition
Ordnance Survey of Scotland, Dornoch and Cromarty, Sheet 9. (1913). [Maps]. Ordnance Survey Office, https://collections.library.yale.edu/catalog/15826806.