Hesse, H. (1972). The glass bead game. Penguin.
Chicago Style aipamenaHesse, Hermann. The Glass Bead Game. New York,: Penguin, 1972.
MLA aipamenaHesse, Hermann. The Glass Bead Game. Penguin, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.