Cita APA (7a ed.)

Wyndham, J., & Langford, B. (1999). The day of the triffids (Reprinted with an introduction.). Penguin Books.

Cita Chicago Style (17a ed.)

Wyndham, John, y Barry Langford. The Day of the Triffids. Reprinted with an introduction. London: Penguin Books, 1999.

Cita MLA (9a ed.)

Wyndham, John, y Barry Langford. The Day of the Triffids. Reprinted with an introduction. Penguin Books, 1999.