PERRE, J. P. (1983). Merril Guide To The Research Paper John P. Ferre. Charles E. Merril Publishing.
Lua i Stíl Chicago (17ú heag.)PERRE, John P. Merril Guide To The Research Paper John P. Ferre. Charles E. Merril Publishing, 1983.
Lua MLA (8ú heag.)PERRE, John P. Merril Guide To The Research Paper John P. Ferre. Charles E. Merril Publishing, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.