McCann, J. (1927). Self Discipline. London.
Lua i Stíl Chicago (17ú heag.)McCann, Justin. Self Discipline. London, 1927.
Lua MLA (8ú heag.)McCann, Justin. Self Discipline. London, 1927.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.