Thurstone, T. G. (1967). Learning to think series. Science Research Associates.
Lua i Stíl Chicago (17ú heag.)Thurstone, T. G. Learning to Think Series. Chicago, Ill.: Science Research Associates, 1967.
Lua MLA (8ú heag.)Thurstone, T. G. Learning to Think Series. Science Research Associates, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.