APA (7th ed.) Citation

Journeau, A. Letter from J. [Journeau?] to Bouhéreau, [no date].

Chicago Style (17th ed.) Citation

Journeau, Active. Letter from J. [Journeau?] to Bouhéreau, [no Date].

MLA (9th ed.) Citation

Journeau, Active. Letter from J. [Journeau?] to Bouhéreau, [no Date].

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