Clüver, C. Brazilian Concrete: Painting, Poetry, Time, and Space: Claus Clüver. Literature and the other arts.(1981).
Chicago-viite (17. p.)Clüver, Claus. "Brazilian Concrete: Painting, Poetry, Time, and Space: Claus Clüver." Literature and the Other Arts.(1981) .
MLA-viite (8. p.)Clüver, Claus. "Brazilian Concrete: Painting, Poetry, Time, and Space: Claus Clüver." Literature and the Other Arts.(1981), .
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.