Gullans, Charles B; Espey, John Jenkins; University of California, Los Angeles; Library; Department of Special Collections; Margaret Armstrong Binding Collection (Library of Congress) (1991 թ․ հունվարի 1). Margaret Armstrong and American trade bindings: with a checklist of her designed bindings and covers (անգլերեն). Los Angeles: Department of Special Collections, University Research Library, University of California. էջ 51. OCLC704904397.
