Instituto Brasileiro de Informação em Ciência e Tecnologia

Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (1970). National Parks and Conservation Magazine. National Parks & Conservation Association.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. National Parks and Conservation Magazine. Washington: National Parks & Conservation Association, 1970.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. National Parks and Conservation Magazine. National Parks & Conservation Association, 1970.