BibTeX:
@incollection{AbdulBah1886,
  author = {'Abdu'l-Bahá},
  title = {A Traveler's Narrative (Part 5 of 5)},
  booktitle = {A Traveler's Narrative},
  year = {1886},
  url = {https://www.gutenberg.org/cache/epub/19300/pg19300-images.html},
}

APA:
'Abdu'l-Bahá. (1886). A Traveler's Narrative (Part 5 of 5). In *A Traveler's Narrative*.

MLA:
'Abdu'l-Bahá. "A Traveler's Narrative (Part 5 of 5)." *A Traveler's Narrative*, 1886.

Chicago:
'Abdu'l-Bahá. "A Traveler's Narrative (Part 5 of 5)." In *A Traveler's Narrative*, 1886.