Brey, W., & Brey, M. (1992). Philadelphia photographers: 1840 - 1900 ; a directory with biographical sketches ; includes a history of the Photographic Society of Philadelphia. Willowdale Press.
Chicago-Zitierstil (17. Ausg.)Brey, William, und Marie Brey. Philadelphia Photographers: 1840 - 1900 ; a Directory with Biographical Sketches ; Includes a History of the Photographic Society of Philadelphia. Cherry Hill, NJ: Willowdale Press, 1992.
MLA-Zitierstil (9. Ausg.)Brey, William, und Marie Brey. Philadelphia Photographers: 1840 - 1900 ; a Directory with Biographical Sketches ; Includes a History of the Photographic Society of Philadelphia. Willowdale Press, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.