Books and Book Chapters
The Transformation of American Quakerism: Orthodox Friends, 1800-1907 (Indiana University Press, 1988)
God's Government Begun: The Society for Universal Inquiry and Reform, 1842-1846 (Indiana University Press, 1995)
Earlham College: A History, 1847-1997 (Indiana University Press, 1997)
The Quakers in America (Columbia University Press, 2003)
Quaker Writings: An Anthology, 1650-1920 (Penguin Classics, 2011)
"The Middle Colonies, 1680-1730," in Cambridge History of Religions in America (Cambridge University Press, 2012)
"Hicksite, Orthodox, and Evangelical Quakerism, 1805-1887," in Oxford Handbook of Quaker Studies (Oxford University Press, 2013)