Willis, R. A. (1948). Pathology of tumours. Butterworth.
Chicago Style aipamenaWillis, R. A. Pathology of Tumours. London: Butterworth, 1948.
MLA aipamenaWillis, R. A. Pathology of Tumours. Butterworth, 1948.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.