Não informado. (2008). Essential Teacher. Teachers of English to Speakers of Other Languages.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Essential Teacher. Alexandria, Va: Teachers of English to Speakers of Other Languages, 2008.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Essential Teacher. Teachers of English to Speakers of Other Languages, 2008.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.