Walker, W. A. (1951). Industrial internal auditing, by W. A. Walker and W. R. Dies. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Walker, Wilbert Alden. Industrial Internal Auditing, by W. A. Walker and W. R. Dies. New york: McGraw-Hill, 1951.
Lua MLA (9ú heag.)Walker, Wilbert Alden. Industrial Internal Auditing, by W. A. Walker and W. R. Dies. McGraw-Hill, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.