CAMPBELL, M. (1991). Satu, dua, tiga [1-2-3] 2.4 The Complete Reference / Mary Campbell. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)CAMPBELL, Mary. Satu, Dua, Tiga [1-2-3] 2.4 The Complete Reference / Mary Campbell. McGraw-Hill, 1991.
Lua MLA (8ú heag.)CAMPBELL, Mary. Satu, Dua, Tiga [1-2-3] 2.4 The Complete Reference / Mary Campbell. McGraw-Hill, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.