Stempleski, S. (2006). World pass: Expanding English fluency : Upper-Intermediate (Workbook). Boston, MA: Thomson/Heinle.
Παραπομπή Chicago StyleStempleski, Susan. World Pass: Expanding English Fluency : Upper-Intermediate (Workbook). Boston, MA: Thomson/Heinle, 2006.
Παραπομπή MLAStempleski, Susan. World Pass: Expanding English Fluency : Upper-Intermediate (Workbook). Boston, MA: Thomson/Heinle, 2006.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.