Cita APA (7a ed.)

Gallagher, M. Letter, To: "My Dear Father," From: "Your affectionate Daughter," December 5 [no year].

Cita Chicago Style (17a ed.)

Gallagher, Ms. Letter, To: "My Dear Father," From: "Your Affectionate Daughter," December 5 [no Year].

Cita MLA (8a ed.)

Gallagher, Ms. Letter, To: "My Dear Father," From: "Your Affectionate Daughter," December 5 [no Year].