Cita APA (7th ed.)
Aton, J. M. (2010). John Wesley Powell: His life and legacy. Bonneville Books.
Cita Chicago (17th ed.)
Aton, James M. John Wesley Powell: His Life and Legacy. Salt Lake City: Bonneville Books, 2010.
Cita MLA (9th ed.)
Aton, James M. John Wesley Powell: His Life and Legacy. Bonneville Books, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.