Cita APA (7a ed.)

Cicerón, M. T. (2018). How to be a friend: : an ancient guide to true friendship. Princeton University Press.

Cita Chicago Style (17a ed.)

Cicerón, Marco Tulio. How to Be a Friend: : An Ancient Guide to True Friendship. Princeton, New Jersey: Princeton University Press, 2018.

Cita MLA (9a ed.)

Cicerón, Marco Tulio. How to Be a Friend: : An Ancient Guide to True Friendship. Princeton University Press, 2018.