Cita APA (7a ed.)

Graddol, D., & Swann, J. (1991). Gender voices. Basil Blackwell.

Cita Chicago Style (17a ed.)

Graddol, David, y Joan Swann. Gender Voices. Oxford [etc.]: Basil Blackwell, 1991.

Cita MLA (9a ed.)

Graddol, David, y Joan Swann. Gender Voices. Basil Blackwell, 1991.