↑McAuliffe, Garrett (2008). Culturally Alert Counseling: A Comprehensive Introduction (به انگلیسی). SAGE Publishing. p. 532. ISBN978-1-4129-1006-4. About one-third of the world's population is considered Christian and can be divided into three main branches: (1) Roman Catholicism (the largest coherent group, representing over one billion baptized members); (2) Orthodox Christianity (including Eastern Orthodoxy and Oriental Orthodoxy); and (3) Protestantism (comprising many denominations and schools of thought, including Anglicanism, Reformed, Presbyterianism, Lutheranism, Methodism, Evangelicalism, and Pentecostalism).
↑Mirola, William; Monahan, Susanne C. (2016). Religion Matters: What Sociology Teaches Us About Religion In Our World (به انگلیسی). Routledge. ISBN978-1-317-34451-3. Orthodox Churches represent one of the three major branches of Christianity, along with Roman Catholicism and Protestantism.
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