Graziano, A. M., & Raulin, M. L. (1989). Research methods: A process of inquiry. Harper & Row.
Lua i Stíl Chicago (17ú heag.)Graziano, Anthony M., agus Michael L. Raulin. Research Methods: A Process of Inquiry. New York: Harper & Row, 1989.
Lua MLA (8ú heag.)Graziano, Anthony M., agus Michael L. Raulin. Research Methods: A Process of Inquiry. Harper & Row, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.