Mumford, B. (1969). 15 Steps out. Logos international.
Lua i Stíl Chicago (17ú heag.)Mumford, Bob. 15 Steps Out. Plainfield,NJ: Logos international, 1969.
Lua MLA (9ú heag.)Mumford, Bob. 15 Steps Out. Logos international, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.