Cita APA (7a ed.)

Collie, j., & Slater, S. (2005). Speaking 2 student's book. Kanisius.

Cita Chicago Style (17a ed.)

Collie, joanne, y Stephen Slater. Speaking 2 Student's Book. Kanisius, 2005.

Cita MLA (9a ed.)

Collie, joanne, y Stephen Slater. Speaking 2 Student's Book. Kanisius, 2005.