Citazione Stile APA (7a Edizione)

Gadd, K. M., & Firth, C. B. (1936). From Ur to Rome (Reference book, 6. impression.). Ginn.

Citazione stile Chigago Style (17a edizione)

Gadd, K. M., e Catherine B. Firth. From Ur to Rome. Reference book, 6. impression. London: Ginn, 1936.

Citatione MLA (9a ed.)

Gadd, K. M., e Catherine B. Firth. From Ur to Rome. Reference book, 6. impression. Ginn, 1936.