Cita APA (7a ed.)

Williams, J. 1. d., Malmkjaer, K., & Brown, G. (1996). Performance and competence in second language acquisition. Cambridge University Press.

Cita Chicago Style (17a ed.)

Williams, John 1960- de, Kirsten Malmkjaer, y Gillian Brown. Performance and Competence in Second Language Acquisition. Cambridge, United Kingdom: Cambridge University Press, 1996.

Cita MLA (9a ed.)

Williams, John 1960- de, et al. Performance and Competence in Second Language Acquisition. Cambridge University Press, 1996.