Lua APA (7ú heag.)
Douglas, N., Meusburger, W., Allan, M., & Swozilek, H. (2004). Norman Douglas: A portrait. La Conchiglia.
Lua i Stíl Chicago (17ú heag.)
Douglas, Norman, Wilhelm Meusburger, Michael Allan, agus Helmut Swozilek. Norman Douglas: A Portrait. Capri: La Conchiglia, 2004.
Lua MLA (9ú heag.)
Douglas, Norman, et al. Norman Douglas: A Portrait. La Conchiglia, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.