Citazione Stile APA (7a Edizione)

Maurer, J., & Schoenberg, I. E. (1999). True colors: An EFL course for real communication. Longman.

Citazione stile Chigago Style (17a edizione)

Maurer, Jay, e Irene E. Schoenberg. True Colors: An EFL Course for Real Communication. New York, EUA: Longman, 1999.

Citatione MLA (9a ed.)

Maurer, Jay, e Irene E. Schoenberg. True Colors: An EFL Course for Real Communication. Longman, 1999.