Citazione Stile APA (7a Edizione)

Troster, J. I. (1979). A Practical way to english: Book three (8.ed.). Instituto Roosevelt Bentivegna.

Citazione stile Chigago Style (17a edizione)

Troster, Joseph I. A Practical Way to English: Book Three. 8.ed. São Paulo, SP: Instituto Roosevelt Bentivegna, 1979.

Citatione MLA (9a ed.)

Troster, Joseph I. A Practical Way to English: Book Three. 8.ed. Instituto Roosevelt Bentivegna, 1979.