Citazione Stile APA (7a Edizione)

Eckersley, C. E., & Salisbury, C. S. (1956). Essential English for foreing students: Book 3.

Citazione stile Chigago Style (17a edizione)

Eckersley, C. E., e Charles Sharrocks Salisbury. Essential English for Foreing Students: Book 3. London, 1956.

Citatione MLA (9a ed.)

Eckersley, C. E., e Charles Sharrocks Salisbury. Essential English for Foreing Students: Book 3. 1956.