APA (7th ed.) Citation

Continental Map Company. (1975). Edna. [publisher not identified].

Chicago Style (17th ed.) Citation

Continental Map Company. Edna. Austin, Tex.: [publisher not identified], 1975.

MLA (9th ed.) Citation

Continental Map Company. Edna. [publisher not identified], 1975.

Warning: These citations may not always be 100% accurate.