Spencer, C., & Tasker, J. (1991). Which of us two?: The story of a love affair / Colin Spencer. Penguin.
Lua i Stíl Chicago (17ú heag.)Spencer, Colin, agus John Tasker. Which of Us Two?: The Story of a Love Affair / Colin Spencer. London [u.a.]: Penguin, 1991.
Lua MLA (8ú heag.)Spencer, Colin, agus John Tasker. Which of Us Two?: The Story of a Love Affair / Colin Spencer. Penguin, 1991.
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