Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.