BibTeX:
@incollection{LadyBlomfield1940,
  author = {Lady Blomfield},
  title = {It Is Finished, I Am Ready},
  booktitle = {The Chosen Highway},
  year = {1940},
  publisher = {George Ronald},
  url = {https://bahai-library.com/blomfield_chosen_highway},
}

APA:
Lady Blomfield. (1940). It Is Finished, I Am Ready. In *The Chosen Highway*. George Ronald.

MLA:
Lady Blomfield. "It Is Finished, I Am Ready." *The Chosen Highway*, George Ronald, 1940.

Chicago:
Lady Blomfield. "It Is Finished, I Am Ready." In *The Chosen Highway*, George Ronald, 1940.