APA Format
Letter from Dr. E. Feuerstein to Dr. Spivak, 28 June 1911, (28 June 1911) Letter from Dr. E. Feuerstein to Dr. Spivak, 28 June 1911. Retrieved from Special Collections @ DU, https://specialcollections.du.edu/object/a14c805a-0cd4-4caf-84a0-e43ce8afe897
MLA Format
Letter from Dr. E. Feuerstein to Dr. Spivak, 28 June 1911. (28 June 1911) Letter from Dr. E. Feuerstein to Dr. Spivak, 28 June 1911. Retrieved from Special Collections @ DU <https://specialcollections.du.edu/object/a14c805a-0cd4-4caf-84a0-e43ce8afe897>.
Chicago Format
Letter from Dr. E. Feuerstein to Dr. Spivak, 28 June 1911. Letter from Dr. E. Feuerstein to Dr. Spivak, 28 June 1911. 28 June 1911. Retrieved from Special Collections @ DU, https://specialcollections.du.edu/object/a14c805a-0cd4-4caf-84a0-e43ce8afe897. (Accessed February 26, 2025.)