Universal. (2024). Post Office Act, 1898. LexisNexis.
Lua i Stíl Chicago (17ú heag.)Universal. Post Office Act, 1898. LexisNexis, 2024.
Lua MLA (9ú heag.)Universal. Post Office Act, 1898. LexisNexis, 2024.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.