SONGEL JUAN MARIA. (2010). CONVERSATION WITH FREI OTTO. PRINCETON ARCHITECTURAL PRESS/NEW YORK.
Chicago-čujuhus (17. p.)SONGEL JUAN MARIA. CONVERSATION WITH FREI OTTO. PRINCETON ARCHITECTURAL PRESS/NEW YORK, 2010.
MLA-čujuhus (9. p.)SONGEL JUAN MARIA. CONVERSATION WITH FREI OTTO. PRINCETON ARCHITECTURAL PRESS/NEW YORK, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.