Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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