" (2007) ISBN 978-0-8078-3105-2* Freehling, William W. "Prelude to Civil War: The Nullification Crisis in South Carolina 1816–1836.
" (2007) ISBN 978-0-8078-3105-2* Freehling, William W. "Prelude to Civil War: The Nullification Crisis in South Carolina 1816—1836.