Victor H. Mair, The Columbia History of Chinese Literature, p. 24 full text: "It has often been facetiously remarked... the falsity of this quip can be demonstrated..."
S. Mchombo, "Nyanja" in Keith Brown, Sarah Ogilvie, eds. , Concise encyclopedia of languages of the world, p. 793
full text: "A recurrent joke in linguistics courses … is the quip that ..."
Timothy B. Weston, Lionel M. Jensen, China beyond the headlines, p. 85 full text: "Weinreich...pointing out the arbitrary division between [dialect and language]"
Thomas Barfield, The Dictionary of Anthropology, s.v. 'sociolinguistics' full text: "Fundamental notions such as 'language' and 'dialect' are primarily social, not linguistic, constructs, because they depend on society in crucial ways."