MLA

Siegel, Jacob S. Demographic and Socioeconomic Basis of Ethnolinguistics. Springer International Publishing, 2018.

APA

Siegel, J. S. (2018). Demographic and Socioeconomic Basis of Ethnolinguistics. Springer International Publishing.

Chicago

Siegel, Jacob S. Demographic and Socioeconomic Basis of Ethnolinguistics. : Springer International Publishing, 2018.