Cita APA (7a ed.)

Christie, A. (1986). Why didn't they ask Evans? Fontana, Collins.

Cita Chicago Style (17a ed.)

Christie, Agatha. Why Didn't They Ask Evans? Glasgow: Fontana, Collins, 1986.

Cita MLA (8a ed.)

Christie, Agatha. Why Didn't They Ask Evans? Fontana, Collins, 1986.