BibTeX:
@incollection{MirzaMahmudiZarqani,
  author = {Mirza Mahmud-i-Zarqani},
  title = {The Seeds at Pleasanton},
  booktitle = {Mahmud's Diary},
}

APA:
Mirza Mahmud-i-Zarqani. The Seeds at Pleasanton. In *Mahmud's Diary*.

MLA:
Mirza Mahmud-i-Zarqani. "The Seeds at Pleasanton." *Mahmud's Diary*, n.d..

Chicago:
Mirza Mahmud-i-Zarqani. "The Seeds at Pleasanton." In *Mahmud's Diary*, n.d..