Não informado. (1956). Minnesota Studies in the Philosophy of Science. Minnesota Center of Philosophy of Science.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Minnesota Studies in the Philosophy of Science. Minneapolis, Minn: Minnesota Center of Philosophy of Science, 1956.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Minnesota Studies in the Philosophy of Science. Minnesota Center of Philosophy of Science, 1956.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.