BibTeX:
@incollection{MrzMamdiZarqn1998,
  author = {Mírzá Maḥmúd-i-Zarqání},
  title = {A Question in the Englewood Garden},
  booktitle = {Mahmúd's Diary: The Diary of Mírzá Maḥmúd-i-Zarqání},
  year = {1998},
}

APA:
Mírzá Maḥmúd-i-Zarqání. (1998). A Question in the Englewood Garden. In *Mahmúd's Diary: The Diary of Mírzá Maḥmúd-i-Zarqání*.

MLA:
Mírzá Maḥmúd-i-Zarqání. "A Question in the Englewood Garden." *Mahmúd's Diary: The Diary of Mírzá Maḥmúd-i-Zarqání*, 1998.

Chicago:
Mírzá Maḥmúd-i-Zarqání. "A Question in the Englewood Garden." In *Mahmúd's Diary: The Diary of Mírzá Maḥmúd-i-Zarqání*, 1998.