Many primary church history documents are parts of a larger collected work. In order to reference correctly you need to refer to both the primary document and the collected work in your footnote and bibliography. This is similar to referencing a book chapter however the publication date of the primary document is included in the title and if the primary document has any section/part numbers within the article these are included as well.
Bogard, "The Baptist Way, 1945," 167.
ed. First name Surname, page numbers of entire document. Title of collected work: Subtitle,
Bogard, Ben M. "The Baptist Way, 1945." In Readings in Baptist History: Four Centuries of Selected Documents, edited by Joseph Early, Jr, 167-71. Nashville: B & H Publishing, 2008.