APA (7e ed.) Bronvermelding

Douglas, E. S., Girimonti, S., & Samuel, J. (2019). C1 speaking skills: The five, themed modules give you non-stop speaking practice. Editorial Tébar Flores.

Chicago (17e ed.) Bronvermelding

Douglas, Elisabeth S., Silvia Girimonti, en Julia Samuel. C1 Speaking Skills: The Five, Themed Modules Give You Non-stop Speaking Practice. Madrid, España: Editorial Tébar Flores, 2019.

MLA (9e ed.) Bronvermelding

Douglas, Elisabeth S., et al. C1 Speaking Skills: The Five, Themed Modules Give You Non-stop Speaking Practice. Editorial Tébar Flores, 2019.