Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Hasan, Ruqaiya, y Peter Howard Fries. On Subject and Theme: A Discourse Functional Perspective. Amsterdam ; Philadelphia: J. Benjamins, 1995.

Cita MLA (8a ed.)

Hasan, Ruqaiya, y Peter Howard Fries. On Subject and Theme: A Discourse Functional Perspective. J. Benjamins, 1995.