APA (7th ed.) Citation

Ingersoll, C., Ingersoll, L. B. R., & Morse, C. I. (1948). The unknown friends: A Civil War romance; letters of my father and my mother. A. Kroch.

Chicago Style (17th ed.) Citation

Ingersoll, Chalmers, Lottie B. Rinewalt Ingersoll, and Charlotte Ingersoll Morse. The Unknown Friends: A Civil War Romance; Letters of My Father and My Mother. Chicago: A. Kroch, 1948.

MLA (9th ed.) Citation

Ingersoll, Chalmers, et al. The Unknown Friends: A Civil War Romance; Letters of My Father and My Mother. A. Kroch, 1948.