Não informado. (1980). Proceedings of the National Academy of Sciences of the United States of America. National Academy of Sciences.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Proceedings of the National Academy of Sciences of the United States of America. Washington: National Academy of Sciences, 1980.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Proceedings of the National Academy of Sciences of the United States of America. National Academy of Sciences, 1980.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.