(1990). Centuries of tutoring: History of alternative education in America and western Europe / by Edward E. Gordon with Elaine H. Gordon.
Lua i Stíl Chicago (17ú heag.)Centuries of Tutoring: History of Alternative Education in America and Western Europe / by Edward E. Gordon with Elaine H. Gordon. 1990.
Lua MLA (9ú heag.)Centuries of Tutoring: History of Alternative Education in America and Western Europe / by Edward E. Gordon with Elaine H. Gordon. 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.