Crofts, F. W. (1945). Enemy unseen: An Inspector French detective story. Hodder & Stoughton.
Citazione stile Chigago Style (17a edizione)Crofts, Freeman Wills. Enemy Unseen: An Inspector French Detective Story. London: Hodder & Stoughton, 1945.
Citatione MLA (8a ed.)Crofts, Freeman Wills. Enemy Unseen: An Inspector French Detective Story. Hodder & Stoughton, 1945.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.