Huhtala, T. (2012). English as a lingua franca: A material package for an optional course in the Finnish comprehensive school.
Chicago-viite (17. p.)Huhtala, Tanja. English as a Lingua Franca: A Material Package for an Optional Course in the Finnish Comprehensive School. Jyväskylä, 2012.
MLA-viite (9. p.)Huhtala, Tanja. English as a Lingua Franca: A Material Package for an Optional Course in the Finnish Comprehensive School. 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.