Gudschinsky, S. C. (1973). A manual of literacy for preliterate peoples. Summer Institute of Linguistics.
Chicago Style aipamenaGudschinsky, Sarah C. A Manual of Literacy for Preliterate Peoples. Ukarumpa, Papua-New Guinea: Summer Institute of Linguistics, 1973.
MLA aipamenaGudschinsky, Sarah C. A Manual of Literacy for Preliterate Peoples. Summer Institute of Linguistics, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.