[…] we can define the dialect simply as the speech of the community in question.
- Harris (1951), a pag.9

Even the speech of one individual, or of a group of persons with similar language histories, may be analyzable into more than one dialect: there may be appreciable linguistic differences in a person’s talk in different social situations (e.g., in some societies, in talk to equals or to superiors). And even when the social matrix is held constant, the talk of an individual or of a language community may vary stylistically in ways which would register variations in elements or in relations among elements.
- Harris (1951), a pag.13