McKee, P. (1951). Teacher's manual for climbing higher. The Riverside Press.
Lua i Stíl Chicago (17ú heag.)McKee, Paul. Teacher's Manual for Climbing Higher. Cambridge, Mass: The Riverside Press, 1951.
Lua MLA (9ú heag.)McKee, Paul. Teacher's Manual for Climbing Higher. The Riverside Press, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.