Schwartz, M. (1966). Exploring American history: Teacher's guide and answer key ([3rd ed.].). Globe Book Co..
Lua i Stíl Chicago (17ú heag.)Schwartz, Melvin. Exploring American History: Teacher's Guide and Answer Key. [3rd ed.]. New York: Globe Book Co., 1966.
Lua MLA (8ú heag.)Schwartz, Melvin. Exploring American History: Teacher's Guide and Answer Key. [3rd ed.]. Globe Book Co., 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.