Christie, A. (1969). Hallowe'en party. Published for the Crime Club by Collins.
Chicago-viite (17. p.)Christie, Agatha. Hallowe'en Party. London: Published for the Crime Club by Collins, 1969.
MLA-viite (8. p.)Christie, Agatha. Hallowe'en Party. Published for the Crime Club by Collins, 1969.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.