Beautiful British Columbia [cartographic material] : 1971-1972 road map, campground & fishing guide / G.E. Brenner, cartographer.
MLA
Brenner, G. E. Beautiful British Columbia [Cartographic Material] : 1971-1972 Road Map, Campground & Fishing Guide / G.E. Brenner, Cartographer. Grant-Mann Lithographers, 1971. https://collections.library.yale.edu/catalog/15536299.
APA, 6th edition
Brenner, G. E. (1971). Beautiful British Columbia [cartographic material] : 1971-1972 road map, campground & fishing guide / G.E. Brenner, cartographer. [Maps]. Grant-Mann Lithographers, https://collections.library.yale.edu/catalog/15536299.