Wuthnow, Robert, John Evans, and others. 2002. The Quiet Hand of God: Faith-Based Activism and the Public Role of Mainline Protestantism. Univ of California Press.

Wuthnow, Robert. 2003. “Overcoming Status Distinctions? Religious Involvement, Social Class, Race, and Ethnicity in Friendship Patterns”. Sociology of Religion 64. Oxford University Press: 423–442.