APA (7th ed.) Citation

Repingon, P. Letter from P. Repingon to Élie Bouhéreau, undated.

Chicago Style (17th ed.) Citation

Repingon, P. Letter from P. Repingon to Élie Bouhéreau, Undated.

MLA (9th ed.) Citation

Repingon, P. Letter from P. Repingon to Élie Bouhéreau, Undated.

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