ebrary, Inc, Granena, G., & Long, M. H. (2013). Sensitive periods, language aptitude, and ultimate L2 attainment. John Benjamins Publishing Company.
芝加哥风格引文ebrary, Inc, Gisela Granena, 与 Michael H. Long. Sensitive Periods, Language Aptitude, and Ultimate L2 Attainment. Amsterdam: John Benjamins Publishing Company, 2013.
MLA引文ebrary, Inc, et al. Sensitive Periods, Language Aptitude, and Ultimate L2 Attainment. John Benjamins Publishing Company, 2013.
警告：这些引文格式不一定是100％准确.