Youngberg, J. a. M. (1985). Heart tuning: A guide to better family worship. Review and Herald.
Lua i Stíl Chicago (17ú heag.)Youngberg, John and Milie. Heart Tuning: A Guide to Better Family Worship. Review and Herald, 1985.
Lua MLA (9ú heag.)Youngberg, John and Milie. Heart Tuning: A Guide to Better Family Worship. Review and Herald, 1985.
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