APA (7th ed.) Citation

Kennedy, G. G. (1898). Kennedy, George G. Mar. 3, 1898 [postcard]. Zenodo.

Chicago Style (17th ed.) Citation

Kennedy, George G. Kennedy, George G. Mar. 3, 1898 [postcard]. Zenodo, 1898.

MLA (9th ed.) Citation

Kennedy, George G. Kennedy, George G. Mar. 3, 1898 [postcard]. Zenodo, 1898.

Warning: These citations may not always be 100% accurate.