APA-Zitierstil (7. Ausg.)

Porwoll, P. J. (1978). Class Size: A summary of research (2. print.). Educational Research Service.

Chicago-Zitierstil (17. Ausg.)

Porwoll, Paul J. Class Size: A Summary of Research. 2. print. Arlington, Va: Educational Research Service, 1978.

MLA-Zitierstil (9. Ausg.)

Porwoll, Paul J. Class Size: A Summary of Research. 2. print. Educational Research Service, 1978.