Cita APA (7a ed.)

Ciceró, M. T., & Williams, W. G. (1965). Letters to his friends. Harvard University Press : William Heinemann.

Cita Chicago Style (17a ed.)

Ciceró, Marc Tul·li, y W. Glynn Williams. Letters to His Friends. Cambridge Massachusetts London: Harvard University Press : William Heinemann, 1965.

Cita MLA (9a ed.)

Ciceró, Marc Tul·li, y W. Glynn Williams. Letters to His Friends. Harvard University Press : William Heinemann, 1965.