Spirituality
American
Bloom, Harold. The American Religion: The Emergence of the Post-Christian Nation (Second Edition) 2006.
Wuthnow, Robert. The Restructuring of American Religion: Society and Faith Since World War II, Princeton University Press, Princeton, New Jersey 1988.
The Amish
Fisher, Suzanne Woods. Amish Peace: Simple Wisdom for a Complicated World. Revell, Grand Rapids, Michigan 2009.
Kraybill, Donald B. Amish Enterprise: From Plows to Profit, John Hopkins University Press, Baltimore, Maryland 1995.