Keating, B. J., & Ahl, E. J. (1964). A survey of interdenominational vacation church schools in 1963. National Council of Churches.
Chicago-viite (17. p.)Keating, Barry J., ja Evelyn J. Ahl. A Survey of Interdenominational Vacation Church Schools in 1963. New York: National Council of Churches, 1964.
MLA-viite (8. p.)Keating, Barry J., ja Evelyn J. Ahl. A Survey of Interdenominational Vacation Church Schools in 1963. National Council of Churches, 1964.
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