San Bernardino County / issued by San Bernardino County Chamber of Commerce.
MLA
San Bernardino County / Issued by San Bernardino County Chamber of Commerce. San Bernardino County Chamber of Commerce?, 1936. https://collections.library.yale.edu/catalog/15818738.
APA, 6th edition
San Bernardino County / issued by San Bernardino County Chamber of Commerce. (1936). [Tourist maps]. San Bernardino County Chamber of Commerce?, https://collections.library.yale.edu/catalog/15818738.