Barnes, J. D. (2006). Early trilingualism: A focus on questions. Multilingual Matters.
芝加哥风格引文Barnes, Julia D. Early Trilingualism: A Focus on Questions. Clevedon, Eng: Multilingual Matters, 2006.
MLA引文Barnes, Julia D. Early Trilingualism: A Focus on Questions. Multilingual Matters, 2006.
警告：这些引文格式不一定是100％准确.