APA (7th ed.) Citation

Ellis, R., & Fotos, S. (1999). Learning a second language through interaction. John Benjamins.

Chicago Style (17th ed.) Citation

Ellis, Rod, and Sandra Fotos. Learning a Second Language Through Interaction. Amsterdam [etc.]: John Benjamins, 1999.

MLA (9th ed.) Citation

Ellis, Rod, and Sandra Fotos. Learning a Second Language Through Interaction. John Benjamins, 1999.