Downie, M. (1999). Your Turn: Student's book 1 (1a. ed.). Richmond Publishing.
Cita Chicago Style (17a ed.)Downie, Michael. Your Turn: Student's Book 1. 1a. ed. Buenos Aires: Richmond Publishing, 1999.
Cita MLA (9a ed.)Downie, Michael. Your Turn: Student's Book 1. 1a. ed. Richmond Publishing, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.