Salkind, N. J. (1991). Exploring research (2nd ed.). Macmillan.
Lua i Stíl Chicago (17ú heag.)Salkind, Neil J. Exploring Research. 2nd ed. New York: Macmillan, 1991.
Lua MLA (9ú heag.)Salkind, Neil J. Exploring Research. 2nd ed. Macmillan, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.