Citazione Stile APA (7a Edizione)

Christie, A. (1971). By the pricking of my thumbs. Fontana ; Collins.

Citazione stile Chigago Style (17a edizione)

Christie, Agatha. By the Pricking of My Thumbs. London: Fontana ; Collins, 1971.

Citatione MLA (8a ed.)

Christie, Agatha. By the Pricking of My Thumbs. Fontana ; Collins, 1971.