Παραπομπή APA

Jones, L., & Leo jones. (1986). Progress to Proficiency: Student is book. Cambridge University Press: Cambridge.

Παραπομπή Chicago Style

Jones, Leo, και Leo jones. Progress to Proficiency: Student Is Book. Cambridge University Press: Cambridge, 1986.

Παραπομπή MLA

Jones, Leo, και Leo jones. Progress to Proficiency: Student Is Book. Cambridge University Press: Cambridge, 1986.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.