Pennsylvania Academy of Science. Proceedings of the Pennsylvania Academy of Science. Pennsylvania Academy of Science.
Lua i Stíl Chicago (17ú heag.)Pennsylvania Academy of Science. Proceedings of the Pennsylvania Academy of Science. [Harrisburg]: Pennsylvania Academy of Science.
Lua MLA (8ú heag.)Pennsylvania Academy of Science. Proceedings of the Pennsylvania Academy of Science. Pennsylvania Academy of Science.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.