Butcher, H. J., & Rudd, E. (1972). Contemporary problems in higher education; an account of research. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Butcher, Harold John, agus Ernest Rudd. Contemporary Problems in Higher Education; an Account of Research. London: McGraw-Hill, 1972.
Lua MLA (9ú heag.)Butcher, Harold John, agus Ernest Rudd. Contemporary Problems in Higher Education; an Account of Research. McGraw-Hill, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.