Principium incurvum
Principium incurvum (Anglice curvilinear principle) in sociolinguistica dicit linguisticam mutationem surgentem ex hominibus mediarum classium socialium in socio-oeconomica communis orationis hierarchia oriri solere, potius quam ex hominibus classium extremarum vel exteriorum.

Gulielmus Labov
Linguistica historica
Sociologia

Notae

Bibliographia
Ash, Sharon. Social Class. In The Handbook of Language Variation and Change, 402-422. Malden Massachusettae: Blackwell.
Labov, William. 1966. The Social Stratification of English in New York City. Cantabrigiae: Cambridge University Press.
Labov, William. 1984. Field methods of the Project on Linguistic Change and Variation. In Language in Use, 43-70. Englewood Cliffs Novae Caesareae: Prentice Hall.
Labov, William. 2001. Social Factors. Principles of Linguistic Change, 3. Oxoniae et Cantabrigiae Massachusettae: Blackwell.
Milroy, James, et Lesley Milroy. 1954. Linguistic Change, Social Network and Speaker Innovation. Journal of Linguistics 21(2): 339-384.
Wardhaugh, Ronald. 2006. An Introduction to Sociolinguistics. Malden Massachusettae: Blackwell Publishing.
Weinreich, U., William Labov, et M. Herzog. 1968. Empirical foundations for a theory of language change. In Directions for Historical Linguistics, ed. W. Lehmann et Y. Malkiel. Austinopoli: University of Texas Press.

Linguistica historica
Sociolinguistica