Gould, S. B., & Cross, K. P. (1972). Explorations in non-traditional study ([1st ed.].). Jossey-Bass.
Lua i Stíl Chicago (17ú heag.)Gould, Samuel B., agus K. Patricia Cross. Explorations in Non-traditional Study. [1st ed.]. San Francisco: Jossey-Bass, 1972.
Lua MLA (8ú heag.)Gould, Samuel B., agus K. Patricia Cross. Explorations in Non-traditional Study. [1st ed.]. Jossey-Bass, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.