Hockney, D. (1981). The artist's eye: Looking at pictures in a book at the National Gallery, 1 July-31 August 1981. Publications Dept., National Gallery.
Chicago Style aipamenaHockney, David. The Artist's Eye: Looking at Pictures in a Book at the National Gallery, 1 July-31 August 1981. London: Publications Dept., National Gallery, 1981.
MLA aipamenaHockney, David. The Artist's Eye: Looking at Pictures in a Book at the National Gallery, 1 July-31 August 1981. Publications Dept., National Gallery, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.