Katz, W. A. (1987). Introduction To Reference Work/wiliam A. Katz. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Katz, William A. Introduction To Reference Work/wiliam A. Katz. McGraw-Hill, 1987.
Lua MLA (8ú heag.)Katz, William A. Introduction To Reference Work/wiliam A. Katz. McGraw-Hill, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.