Cita APA (7a ed.)

Bousset, R. English with sounds and patterns 2. S.M.

Cita Chicago Style (17a ed.)

Bousset, Rudiger. English with Sounds and Patterns 2. Madrid: S.M.

Cita MLA (9a ed.)

Bousset, Rudiger. English with Sounds and Patterns 2. S.M.