Billups, A. (1980). Perspectives: Discussion starters on attitudes and values for church groups. Judson.
Lua i Stíl Chicago (17ú heag.)Billups, Ann. Perspectives: Discussion Starters on Attitudes and Values for Church Groups. Valley forge: Judson, 1980.
Lua MLA (9ú heag.)Billups, Ann. Perspectives: Discussion Starters on Attitudes and Values for Church Groups. Judson, 1980.
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