Citazione Stile APA (7a Edizione)

Roosevelt, T. (1951). The letters of Theodore Roosevelt. Harvard University Press.

Citazione stile Chigago Style (17a edizione)

Roosevelt, Theodore. The Letters of Theodore Roosevelt. Cambridge, Mass: Harvard University Press, 1951.

Citatione MLA (9a ed.)

Roosevelt, Theodore. The Letters of Theodore Roosevelt. Harvard University Press, 1951.