APA (7th ed.) Citation

CP Air. (1951). Canadian Pacific air lines map. Canadian Pacific air lines.

Chicago Style (17th ed.) Citation

CP Air. Canadian Pacific Air Lines Map. [Vancouver, B.C.?]: Canadian Pacific air lines, 1951.

MLA (8th ed.) Citation

CP Air. Canadian Pacific Air Lines Map. Canadian Pacific air lines, 1951.

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