APA Style
Christie, Agatha,. (1983).
thirteen problems .
Great Britain:
Fontana.
Chicago Style
Christie, Agatha,.
thirteen problems.
Great Britain:
Fontana,
1983.
print.
MLA Style
Christie, Agatha,.
thirteen problems.
Great Britain:
Fontana,
1983.
print.
Turabian Style
Christie, Agatha,.
thirteen problems.
Great Britain:
Fontana,
1983.
print.