APA (7th ed.) Citation

Lightfoot, D. (1979). Principles of diachronic syntax. University Press.

Chicago Style (17th ed.) Citation

Lightfoot, David. Principles of Diachronic Syntax. Cambridge [etc.]: University Press, 1979.

MLA (9th ed.) Citation

Lightfoot, David. Principles of Diachronic Syntax. University Press, 1979.