Não informado. (2018). The Penrose Graphic Arts International Annual. Lund Humphries.
Chicago (17e ed.) BronvermeldingNão informado. The Penrose Graphic Arts International Annual. London: Lund Humphries, 2018.
MLA (8e ed.) BronvermeldingNão informado. The Penrose Graphic Arts International Annual. Lund Humphries, 2018.
Let op: Deze citaties zijn niet altijd 100% accuraat.