Citazione APA

Schwan, M., Bergan, J. S., & Campbell, D. P. (1980). Peace: A guide for prayer. Center for Christian Renewal.

Stile di citazione Chicago

Schwan, Marie, Jacqueline Syrup Bergan, e Donna Pierce Campbell. Peace: A Guide for Prayer. Crookston, MN: Center for Christian Renewal, 1980.

Citazione MLA

Schwan, Marie, et al. Peace: A Guide for Prayer. Center for Christian Renewal, 1980.