Billups, A. (1980). Perspectives: Discussion starters on attitudes and values for church groups. Judson.
芝加哥风格引文Billups, Ann. Perspectives: Discussion Starters on Attitudes and Values for Church Groups. Valley forge: Judson, 1980.
MLA引文Billups, Ann. Perspectives: Discussion Starters on Attitudes and Values for Church Groups. Judson, 1980.
警告：这些引文格式不一定是100％准确.