Niebuhr, R. (1959). Nations and empires: Recurring patterns in the political order. Faber and Faber.
Citazione stile Chigago Style (17a edizione)Niebuhr, Reinhold. Nations and Empires: Recurring Patterns in the Political Order. Londres: Faber and Faber, 1959.
Citatione MLA (9a ed.)Niebuhr, Reinhold. Nations and Empires: Recurring Patterns in the Political Order. Faber and Faber, 1959.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.