* The History of the Methodist Episcopal Church (1926)
* Methodism and Society in the United States (1940)
* The American Revolution (1951)
* Who Are the Amish? (1954)
* Quakers and the American Dream (1960)
* The Study of American Christianity (1963)
* Living His Life (1970)
* The Life of Bishop Francis Asbury (1973)
* An American Bible: Selections from a Nation's Story (1974)
* Living the Life: A Call to Discipleship (1980)
* The Shaping of American Christianity (1981)
* Methodist Worship in America (1983)
* American Catholicism and Social Reform: The New Deal Years (1984)
* The Legacy of Bishop Francis Asbury (1986)
* American Church Architecture: A Pictorial History (1987)
* The History of Protestantism in the United States: A Textbook (1988)
* American Evangelicals and World Missions (1990)
* The United Methodist Hymnal (1991)
* The New United Methodist Hymnal (2006)
* The Story of the Methodist Hymnal (2010)
* The Church in America: A History (2013)
Articles
* "The Development of Methodism in America: A Historical Overview" (1956)
* "Methodism and the American Frontier" (1960)
* "The Social Impact of Methodism in America" (1964)
* "The Methodist Episcopal Church in the Nineteenth Century" (1967)
* "The Methodist Church in the Twentieth Century" (1970)
* "Methodism and Ecumenism" (1973)
* "The Methodist Hymnal: A Historical Perspective" (1991)
* "The United Methodist Hymnal: A New Vision for Worship" (2006)
Other Writings
* "Methodist History" (column, The Christian Advocate, 1960-1987)
* "The Study of American Christianity" (column, The Methodist Review, 1963-1983)
* "American Church History: A Book Review Essay" (column, Church History, 1981-1986)
* "Theology and Worship" (column, The Hymn, 1986-1991)
* "American Christianity: A Historical Overview" (column, The Journal of Religion, 1991-2013)