Não informado. Northwest Science. Northwest Scientific Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Northwest Science. Pullman, Wash: Northwest Scientific Association.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Northwest Science. Northwest Scientific Association.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.