Não informado. (1971). K-eight: Learning through media. North American Publishing.
Chicago-Zitierstil (17. Ausg.)Não informado. K-eight: Learning Through Media. Philadelphia, Pa: North American Publishing, 1971.
MLA-Zitierstil (8. Ausg.)Não informado. K-eight: Learning Through Media. North American Publishing, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.