John R Boyd. Connections communicative listening and speaking activities. New York: Regents.
Παραπομπή Chicago StyleJohn R Boyd. Connections Communicative Listening and Speaking Activities. New York: Regents.
Παραπομπή MLAJohn R Boyd. Connections Communicative Listening and Speaking Activities. New York: Regents.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.