Lua APA (7ú heag.)
Pauline J Lawrence & Goodhart, D. (1968). Concepts in american history. Cambridge books.
Lua i Stíl Chicago (17ú heag.)
Pauline J Lawrence agus David Goodhart. Concepts in American History. New York: Cambridge books, 1968.
Lua MLA (9ú heag.)
Pauline J Lawrence agus David Goodhart. Concepts in American History. Cambridge books, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.