APA (7th ed.) Citation

Douglas, E. S., Girimonti, S., & Samuel, J. (2019). C1 train up your skills: Extensive English skills practice. Editorial Tébar Flores.

Chicago Style (17th ed.) Citation

Douglas, Elisabeth S., Silvia Girimonti, and Julia Samuel. C1 Train Up Your Skills: Extensive English Skills Practice. Madrid: Editorial Tébar Flores, 2019.

MLA (9th ed.) Citation

Douglas, Elisabeth S., et al. C1 Train Up Your Skills: Extensive English Skills Practice. Editorial Tébar Flores, 2019.