Cita APA

Jones, L. (1986). Progress to proficiency: Student's book. Cambridge: Cambridge Univ. Press.

Citación estilo Chicago

Jones, Leo. Progress to Proficiency: Student's Book. Cambridge: Cambridge Univ. Press, 1986.

Cita MLA

Jones, Leo. Progress to Proficiency: Student's Book. Cambridge: Cambridge Univ. Press, 1986.