Richards, J. C., & Bohlke, D. (2012). Speak now 4: Communicate with confidence. New York: Oxford University Press.
Παραπομπή Chicago StyleRichards, Jack C., και David Bohlke. Speak Now 4: Communicate With Confidence. New York: Oxford University Press, 2012.
Παραπομπή MLARichards, Jack C., και David Bohlke. Speak Now 4: Communicate With Confidence. New York: Oxford University Press, 2012.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.