CONCRETE SPIRIT .. (1995). Concrete spirit: The architecture of Ralph Allen. Rockport.
Chicago-čujuhus (17. p.)CONCRETE SPIRIT .. Concrete Spirit: The Architecture of Ralph Allen. Massachusetts: Rockport, 1995.
MLA-čujuhus (9. p.)CONCRETE SPIRIT .. Concrete Spirit: The Architecture of Ralph Allen. Rockport, 1995.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.