Cita APA (7th ed.)

Doff, A., & Jones, C. (2007). Language links: Grammar and vocabulary for reference and self-study. Pre-intermediate. Cambridge University Press.

Cita Chicago (17th ed.)

Doff, Adrian, i Christopher Jones. Language Links: Grammar and Vocabulary for Reference and Self-study. Pre-intermediate. Cambridge University Press, 2007.

Cita MLA (9th ed.)

Doff, Adrian, i Christopher Jones. Language Links: Grammar and Vocabulary for Reference and Self-study. Pre-intermediate. Cambridge University Press, 2007.