Francis, D. (1985). Portugal 1715-1808. Tamesis Books.
Lua i Stíl Chicago (17ú heag.)Francis, David. Portugal 1715-1808. Tamesis Books, 1985.
Lua MLA (8ú heag.)Francis, David. Portugal 1715-1808. Tamesis Books, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.