Wyatt, Robert, and John Andrew Johnson. "Carl Van Vechten: Letter to George Gershwin (February 14, 1924)." The George Gershwin Reader. : Oxford University Press, 2007-05-25. Oxford Scholarship Online. 2011-10-03. Date Accessed 26 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195327113.001.0001/acprof-9780195327113-chapter-14>.
Wyatt, R., & Johnson, J.(2007-05-25). Carl Van Vechten: Letter to George Gershwin (February 14, 1924). In The George Gershwin Reader. : Oxford University Press. Retrieved 26 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195327113.001.0001/acprof-9780195327113-chapter-14.
Wyatt, Robert, and John Andrew Johnson. "Carl Van Vechten: Letter to George Gershwin (February 14, 1924)." In The George Gershwin Reader. : Oxford University Press, 2007-05-25. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195327113.001.0001/acprof-9780195327113-chapter-14.
Wyatt R, Johnson JA. Carl Van Vechten: Letter to George Gershwin (February 14, 1924). In: Wyatt R, Johnson JA. The George Gershwin Reader. Oxford University Press; 2007. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195327113.001.0001/acprof-9780195327113-chapter-14. Accessed May 26, 2013.