Please use the following citation when using the RelTrad method for classifying religious affiliations:
Steensland, Brian, Jerry Z. Park, Mark D. Regnerus, Lynn Robinson, W. Bradford Wilcox, and Robert D. Woodberry. 2000. “The Measure of American Religion: Toward Improving the State-of-the-Art.” Social Forces 79:291-318.
The following are additional readings you may find useful in understanding the significance of religious affiliation coding.
Woodberry, Robert D., Jerry Z. Park and Lyman A. Kellstedt, with Mark D. Regnerus and Brian Steensland. 2012. “The Measure of American Religious Traditions: Theoretical and Measurement Considerations.” Social Forces 91:65-73.
Steensland, Brian, Robert D. Woodberry, and Jerry Z. Park. Forthcoming. “Structure, Placement and the Quest for Unidimensional Purity in Typologies of American Denominations. Journal for the Scientific Study of Religion.