Langer, W. L. (1952). An encyclopedia of world history: Ancient, medieval, and modern, chronologicall y arranged. Riverside Press.
Citazione stile Chigago Style (17a edizione)Langer, William L. An Encyclopedia of World History: Ancient, Medieval, and Modern, Chronologicall Y Arranged. Cambridge: Riverside Press, 1952.
Citatione MLA (9a ed.)Langer, William L. An Encyclopedia of World History: Ancient, Medieval, and Modern, Chronologicall Y Arranged. Riverside Press, 1952.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.