ebrary, Inc, Delbecque, N., Auwera, J. v. d., & Geeraerts, D. (2005). Perspectives on variation: Sociolinguistic, historical, comparative. Mouton de Gruyter.
芝加哥风格引文ebrary, Inc, Nicole Delbecque, Johan van der Auwera, 与 Dirk Geeraerts. Perspectives on Variation: Sociolinguistic, Historical, Comparative. Berlin ; New York: Mouton de Gruyter, 2005.
MLA引文ebrary, Inc, et al. Perspectives on Variation: Sociolinguistic, Historical, Comparative. Mouton de Gruyter, 2005.
警告：这些引文格式不一定是100％准确.