Citazione Stile APA (7a Edizione)

Hasan, R., & Fries, P. H. (1995). On subject and theme: A discourse functional perspective. John Benjamins.

Citazione stile Chigago Style (17a edizione)

Hasan, Ruqaiya, e Peter H. Fries. On Subject and Theme: A Discourse Functional Perspective. Amsterdam: John Benjamins, 1995.

Citatione MLA (9a ed.)

Hasan, Ruqaiya, e Peter H. Fries. On Subject and Theme: A Discourse Functional Perspective. John Benjamins, 1995.