Southworth, G. V. D., & Southworth, J. V. D. (1946). Early days in America: The period of exploration, the thirteen colonies, the intercolonial wars, the struggle for independence, the adoption of the Constitution, and our country's growifng frontiers. Iroquois Publishing Co..
Lua i Stíl Chicago (17ú heag.)Southworth, Gertrude Van Duyn, agus John Van Duyn Southworth. Early Days in America: The Period of Exploration, the Thirteen Colonies, the Intercolonial Wars, the Struggle for Independence, the Adoption of the Constitution, and Our Country's Growifng Frontiers. Syracuse, N.Y. : New York [etc.]: Iroquois Publishing Co., 1946.
Lua MLA (8ú heag.)Southworth, Gertrude Van Duyn, agus John Van Duyn Southworth. Early Days in America: The Period of Exploration, the Thirteen Colonies, the Intercolonial Wars, the Struggle for Independence, the Adoption of the Constitution, and Our Country's Growifng Frontiers. Iroquois Publishing Co., 1946.