Thorwald, J., Winston, R., & Winston, C. (1969). Proof of poison: Jürgen Thorwald. [Transl. from the German by Richard and Clara Winston] (Unabridged.). Pan Books.
Chicago-referens (17:e uppl.)Thorwald, Jürgen, Richard Winston, och Clara Winston. Proof of Poison: Jürgen Thorwald. [Transl. from the German by Richard and Clara Winston]. Unabridged. London: Pan Books, 1969.
MLA-referens (8:e uppl.)Thorwald, Jürgen, et al. Proof of Poison: Jürgen Thorwald. [Transl. from the German by Richard and Clara Winston]. Unabridged. Pan Books, 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.