Não informado. (1968). Contemporary education. Indiana University, School of Education.
Čikaški stil citiranja (17. izdanje)Não informado. Contemporary Education. Terre Haute, Ind: Indiana University, School of Education, 1968.
MLA način citiranja (8. izdanje)Não informado. Contemporary Education. Indiana University, School of Education, 1968.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.