APA (7th ed.) Citation

Island Blue Print & Map Co. (1970). Street map of Langford and Metchosin (Rev. ed. 1970.). [publisher not identified].

Chicago Style (17th ed.) Citation

Island Blue Print & Map Co. Street Map of Langford and Metchosin. Rev. ed. 1970. Victoria, B.C.: [publisher not identified], 1970.

MLA (9th ed.) Citation

Island Blue Print & Map Co. Street Map of Langford and Metchosin. Rev. ed. 1970. [publisher not identified], 1970.