Cita APA (7a ed.)

Butler R. A. & Braun Thom. (1980). Sybil Or The Two Nations. Penguin Books.

Cita Chicago Style (17a ed.)

Butler R. A. y Braun Thom. Sybil Or The Two Nations. London: Penguin Books, 1980.

Cita MLA (9a ed.)

Butler R. A. y Braun Thom. Sybil Or The Two Nations. Penguin Books, 1980.