Gaya APA
Sayers, D, L. (1977).
The unpleasantness at the Bellona Club, repr. ed. Cet.pertama 1921. .
[London]:
New English Library.
Gaya MLA
Sayers, Dorothy, L..
"The unpleasantness at the Bellona Club, repr. ed. Cet.pertama 1921. ".
[London]:
New English Library,
1977.
Buku.