Two letters,
I: Anthony Wayne and lake George, letter from General Anthony Wayne to General Schuyler, Ticonderoga, March 23, 1777; II: Washington's announcement of Arnold's treason, letter from George Washington to the Judge Advocate General, September 26, 1780.
APA Citation
Wayne, A., Washington, G. (1922). Two letters: I: Anthony Wayne and lake George, letter from General Anthony Wayne to General Schuyler, Ticonderoga, March 23, 1777; II: Washington's announcement of Arnold's treason, letter from George Washington to the Judge Advocate General, September 26, 1780. [Boston]: W. K. Bixby.
MLA Citation
Wayne, Anthony, 1745-1796, and George Washington. Two Letters: I: Anthony Wayne And Lake George, Letter From General Anthony Wayne to General Schuyler, Ticonderoga, March 23, 1777; II: Washington's Announcement of Arnold's Treason, Letter From George Washington to the Judge Advocate General, September 26, 1780. [Boston]: W. K. Bixby, 1922.
Warning: These citations may not always be complete (especially for serials).