Stacy, R. A., & Shear, D. (1975). [Letter to David Shear]. Organisation for Economic Co-operation and Development.
Lua i Stíl Chicago (17ú heag.)Stacy, Roy A., agus David Shear. [Letter to David Shear]. Paris: Organisation for Economic Co-operation and Development, 1975.
Lua MLA (8ú heag.)Stacy, Roy A., agus David Shear. [Letter to David Shear]. Organisation for Economic Co-operation and Development, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.