APA (7th ed.) Citation

Lehmann, W. P. (1992). Historical linguistics: An introduction (3rd ed.). Routledge.

Chicago Style (17th ed.) Citation

Lehmann, Winfred P. Historical Linguistics: An Introduction. 3rd ed. London ; New York: Routledge, 1992.

MLA (9th ed.) Citation

Lehmann, Winfred P. Historical Linguistics: An Introduction. 3rd ed. Routledge, 1992.