Cita APA (7a ed.)

Spencer, C., & Tasker, J. (1991). Which of us two?: The story of a love affair / Colin Spencer. Penguin.

Cita Chicago Style (17a ed.)

Spencer, Colin, y John Tasker. Which of Us Two?: The Story of a Love Affair / Colin Spencer. London [u.a.]: Penguin, 1991.

Cita MLA (8a ed.)

Spencer, Colin, y John Tasker. Which of Us Two?: The Story of a Love Affair / Colin Spencer. Penguin, 1991.