APA (7th ed.) Citation

Crosby/Fletcher/Forbes. (1970). A sign systems manual. Praeger.

Chicago Style (17th ed.) Citation

Crosby/Fletcher/Forbes. A Sign Systems Manual. New York: Praeger, 1970.

MLA (9th ed.) Citation

Crosby/Fletcher/Forbes. A Sign Systems Manual. Praeger, 1970.

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