Cita APA (7a ed.)

Havenhill, J., & Lightfoot, D. (2019). Variable Properties in Language: Their Nature and Acquisition. Georgetown University Press.

Cita Chicago Style (17a ed.)

Havenhill, Jonathan, y David Lightfoot. Variable Properties in Language: Their Nature and Acquisition. Washington, DC: Georgetown University Press, 2019.

Cita MLA (8a ed.)

Havenhill, Jonathan, y David Lightfoot. Variable Properties in Language: Their Nature and Acquisition. Georgetown University Press, 2019.