APA (7th ed.) Citation

MacDonald, J. A., & Johnson, J. K. The Letters. Public Archives of Canada.

Chicago Style (17th ed.) Citation

MacDonald, John Alexander, and J. K. Johnson. The Letters. Ottawa: Public Archives of Canada.

MLA (9th ed.) Citation

MacDonald, John Alexander, and J. K. Johnson. The Letters. Public Archives of Canada.

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