APA-viite (7. p.)

CHRISTIE, A. (1993). POIROT'S EARLY CASES. HARPER COLLINS PUBLISHERS.

Chicago-viite (17. p.)

CHRISTIE, AGATHA. POIROT'S EARLY CASES. LONDON: HARPER COLLINS PUBLISHERS, 1993.

MLA-viite (9. p.)

CHRISTIE, AGATHA. POIROT'S EARLY CASES. HARPER COLLINS PUBLISHERS, 1993.