Edith L. Blumhofer is director of the Institute for the Study of American Evangelicals at Wheaton College in Wheaton, Ill. She has written extensively on Pentecostalism.

Allan H. Anderson is professor of  global Pentecostal studies at the Centre for Pentecostal and Charismatic Studies at the University of Birmingham in the United Kingdom.

The Rev. Billy Wilson runs World Impact, an evangelism television ministry based in Cleveland, Tenn.

J. Lee Grady is contributing editor for Charisma Magazine, one of the leading periodicals of the Pentecostal community, and part of the Charisma Media group that produces magazines, books, other literature and ministry aids for Pentecostals. A veteran journalist, Grady is a knowledgeable and well-respected commentator on the Pentecostal scene.

David Daniels, a professor at McCormick Theological Seminary in Chicago, is an expert in African Pentecostalism.

Timothy Samuel Shah is associate director of the Religious Freedom Project at the Berkley Center for Religion, Peace and World Affairs and is visiting assistant professor in the government department at Georgetown University in Washington, D.C. In 2005 Shah taught a course on Pentecostalism and globalization for the annual summer school program at Boston University’s Institute on […]

Cecil M. “Mel” Robeck Jr. is a professor of church history and ecumenics and director of the David J. DuPlessis Center for Christian Spirituality at Fuller Theological Seminary in Pasadena, Calif. Robeck is a leading scholar and commentator on Pentecostalism and author of The Azusa Street Mission and Revival, (Thomas Nelson Publishers, 2006).

Arlene Sánchez-Walsh is a religious studies professor at Azusa Pacific University in Azuza, California. She is an authority on Latino evangelicals, and her current research is on the rise of nonbelief among Latinos and Latinas. Her books include Latino Pentecostal Identity: Evangelical Faith, Self and Society.  

The American Religion Data Archive lists Pentecostal denominations (scroll down to U.S. Denominations). Some scholars have named more than 300.