ebrary, Inc, Bayley, R., & Preston, D. R. (1996). Second language acquisition and linguistic variation. J. Benjamins.
芝加哥风格引文ebrary, Inc, Robert Bayley, 与 Dennis Richard Preston. Second Language Acquisition and Linguistic Variation. Amsterdam ; Philadelphia: J. Benjamins, 1996.
MLA引文ebrary, Inc, et al. Second Language Acquisition and Linguistic Variation. J. Benjamins, 1996.
警告：这些引文格式不一定是100％准确.