BibTeX:
@incollection{LadyBlomfield1940,
  author = {Lady Blomfield},
  title = {The Last Full Measure: 'Abdu'l-Bahá's Final Years of Service},
  booktitle = {The Chosen Highway},
  year = {1940},
  publisher = {Bahá'í Publishing Trust},
  url = {https://bahai-library.com/blomfield_chosen_highway},
}

APA:
Lady Blomfield. (1940). The Last Full Measure: 'Abdu'l-Bahá's Final Years of Service. In *The Chosen Highway*. Bahá'í Publishing Trust.

MLA:
Lady Blomfield. "The Last Full Measure: 'Abdu'l-Bahá's Final Years of Service." *The Chosen Highway*, Bahá'í Publishing Trust, 1940.

Chicago:
Lady Blomfield. "The Last Full Measure: 'Abdu'l-Bahá's Final Years of Service." In *The Chosen Highway*, Bahá'í Publishing Trust, 1940.