Citazione Stile APA (7a Edizione)

Troster, J. I. (1977). A Practical way to english: Book one (19.ed.). Instituto Roosevelt Bentivegna.

Citazione stile Chigago Style (17a edizione)

Troster, Joseph I. A Practical Way to English: Book One. 19.ed. São Paulo, SP: Instituto Roosevelt Bentivegna, 1977.

Citatione MLA (9a ed.)

Troster, Joseph I. A Practical Way to English: Book One. 19.ed. Instituto Roosevelt Bentivegna, 1977.