Goebel, E. J., Mary Richardine, S., & O'Loughlin, J. E. (1965). United States history: Grade 7. Laidlaw Brothers, a division of Doubleday & Company, Inc..
Lua i Stíl Chicago (17ú heag.)Goebel, Edmund J., Sister Mary Richardine, agus John E. O'Loughlin. United States History: Grade 7. River Forest, Illinois: Laidlaw Brothers, a division of Doubleday & Company, Inc., 1965.
Lua MLA (8ú heag.)Goebel, Edmund J., et al. United States History: Grade 7. Laidlaw Brothers, a division of Doubleday & Company, Inc., 1965.
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