Cita APA (7th ed.)

Ladefoged, P., & Disner, S. F. (2012). Vowels and consonants (3a. ed.). John Wiley and Sons.

Cita Chicago (17th ed.)

Ladefoged, Peter, i Sandra Ferrari Disner. Vowels and Consonants. 3a. ed. Chichester: John Wiley and Sons, 2012.

Cita MLA (9th ed.)

Ladefoged, Peter, i Sandra Ferrari Disner. Vowels and Consonants. 3a. ed. John Wiley and Sons, 2012.