Bolton, F. E. (1910). Principles of education. C. Scribner's sons.
Lua i Stíl Chicago (17ú heag.)Bolton, Frederick Elmer. Principles of Education. New York: C. Scribner's sons, 1910.
Lua MLA (8ú heag.)Bolton, Frederick Elmer. Principles of Education. C. Scribner's sons, 1910.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.