APA (7th ed.) Citation

Gingell, L. P. (1973). The ABC's of the open classroom. [ETC Publications].

Chicago Style (17th ed.) Citation

Gingell, Lesley P. The ABC's of the Open Classroom. [Homewood, Ill.]: [ETC Publications], 1973.

MLA (9th ed.) Citation

Gingell, Lesley P. The ABC's of the Open Classroom. [ETC Publications], 1973.