Jones, L. (1991). Progress to proficiency: Teacher's book. Cambridge: Cambridge University Press.
Trích dẫn kiểu ChicagoJones, Leo. Progress to Proficiency: Teacher's Book. Cambridge: Cambridge University Press, 1991.
MLA引文Jones, Leo. Progress to Proficiency: Teacher's Book. Cambridge: Cambridge University Press, 1991.
警告:這些引文格式不一定是100%准確.