USEFUL & HADIKUSUMO, B. (1988). Useful vocabs: Expressions and idiomatic problems. Kanisius.
芝加哥风格引文USEFUL 与 B.U HADIKUSUMO. Useful Vocabs: Expressions and Idiomatic Problems. Yogyakarta: Kanisius, 1988.
MLA引文USEFUL 与 B.U HADIKUSUMO. Useful Vocabs: Expressions and Idiomatic Problems. Kanisius, 1988.
警告：这些引文格式不一定是100％准确.