(1962). Penrose annual: Review of the graphic arts. London: Lund Humphries & co., Ltd.
Chicago Style aipamenaPenrose Annual: Review of the Graphic Arts. London: Lund Humphries & co., Ltd, 1962.
MLA aipamenaPenrose Annual: Review of the Graphic Arts. London: Lund Humphries & co., Ltd, 1962.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.