Many thanks to Dr. Nancy L. Graham for reviewing the first draft of the History Through 26 Hymns and Songs book. She advised the book would benefit from implementing an established, stantardized system for indicating references. She pointed out that of the commonly used style manuals, the one most widely used in the social sciences subject area is the Chicago Style manual. That is the one adopted for this book. Her recommendiation significantly shaped presentation in this publication.
Dr. Graham has numerous publications you can see at Dr. Nancy L. Graham.