Douglas, E. S., Girimonti, S., & Samuel, J. (2019). B1 skills training: The six, themed units give you extensive skills practice to up your level or prepare your exams. Editorial Tébar Flores.

Douglas, Elisabeth S., Silvia Girimonti, and Julia Samuel. B1 Skills Training: The Six, Themed Units Give You Extensive Skills Practice to Up Your Level or Prepare Your Exams. Madrid, España: Editorial Tébar Flores, 2019.

Douglas, Elisabeth S., et al. B1 Skills Training: The Six, Themed Units Give You Extensive Skills Practice to Up Your Level or Prepare Your Exams. Editorial Tébar Flores, 2019.