XI Bienal Sao Paulo; 1971; Raoul De Keyser, Etienne Elias, Hans Persoons, Roger Raveel, Pjeroo Roobjee

MLA

Xi Bienal Sao Paulo; 1971; Raoul De Keyser, Etienne Elias, Hans Persoons, Roger Raveel, Pjeroo Roobjee. Tielt: Lannoo, .

APA

(.). XI Bienal Sao Paulo; 1971; Raoul De Keyser, Etienne Elias, Hans Persoons, Roger Raveel, Pjeroo Roobjee. Tielt: Lannoo.

Chicago

XI Bienal Sao Paulo; 1971; Raoul De Keyser, Etienne Elias, Hans Persoons, Roger Raveel, Pjeroo Roobjee. Tielt: Lannoo, ..