Billups, A. (1980). Perspectives: Discussion starters on attitudes and values for church groups. Judson.
Chicago-referens (17:e uppl.)Billups, Ann. Perspectives: Discussion Starters on Attitudes and Values for Church Groups. Valley forge: Judson, 1980.
MLA-referens (9:e uppl.)Billups, Ann. Perspectives: Discussion Starters on Attitudes and Values for Church Groups. Judson, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.