Cite

Preliminary map of Queen Charlotte Islands [cartographic material] / G.G. Aitkens, Chief Geographer.

MLA

of Lands, British Columbia. Dept. Preliminary Map of Queen Charlotte Islands [Cartographic Material] / G.G. Aitkens, Chief Geographer. Dept. of Lands, 1927. https://collections.library.yale.edu/catalog/15536315.

APA, 6th edition

of Lands, B. C. D. (1927). Preliminary map of Queen Charlotte Islands [cartographic material] / G.G. Aitkens, Chief Geographer. [Maps]. Dept. of Lands, https://collections.library.yale.edu/catalog/15536315.