House, S. (1999). Rocket!. Pupil`s Book 1 (1a. ed.). Richmond Publishing.
Cita Chicago Style (17a ed.)House, Susan. Rocket!. Pupil`s Book 1. 1a. ed. Madrid: Richmond Publishing, 1999.
Cita MLA (9a ed.)House, Susan. Rocket!. Pupil`s Book 1. 1a. ed. Richmond Publishing, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.