Robertson, H., & Yerbury, F. R. (1989). Travels in modern architecture: 1925 - 1930 / Howard Robertson and F. R. Yerbury. Architectural Assoc..
Lua i Stíl Chicago (17ú heag.)Robertson, Howard, agus F. R. Yerbury. Travels in Modern Architecture: 1925 - 1930 / Howard Robertson and F. R. Yerbury. London: Architectural Assoc., 1989.
Lua MLA (8ú heag.)Robertson, Howard, agus F. R. Yerbury. Travels in Modern Architecture: 1925 - 1930 / Howard Robertson and F. R. Yerbury. Architectural Assoc., 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.