BibTeX:
@incollection{JulietThompson1947,
  author = {Juliet Thompson},
  title = {The Prince on the Terrace},
  booktitle = {The Diary of Juliet Thompson},
  year = {1947},
}

APA:
Juliet Thompson. (1947). The Prince on the Terrace. In *The Diary of Juliet Thompson*.

MLA:
Juliet Thompson. "The Prince on the Terrace." *The Diary of Juliet Thompson*, 1947.

Chicago:
Juliet Thompson. "The Prince on the Terrace." In *The Diary of Juliet Thompson*, 1947.