Held, D. (1980). Introduction to critical theory: Horkheimer to Habermas. Hutchinson.
Lua i Stíl Chicago (17ú heag.)Held, David. Introduction to Critical Theory: Horkheimer to Habermas. London: Hutchinson, 1980.
Lua MLA (8ú heag.)Held, David. Introduction to Critical Theory: Horkheimer to Habermas. Hutchinson, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.