Instituto Brasileiro de Informação em Ciência e Tecnologia

Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (1969). Perspectives. Association for General and Liberal Studies.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. Perspectives. Kalamazoo, Mich: Association for General and Liberal Studies, 1969.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. Perspectives. Association for General and Liberal Studies, 1969.