APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Gingell, Lesley P. The ABC's of the Open Classroom. ETC Pub, 1973.