APA
(1948). An Encyclopedia of World History : Ancient, Medieval and Modern. Boston, MA: Houghton Mifflin.
Chicago
1948. An Encyclopedia of World History : Ancient, Medieval and Modern. Boston, MA: Houghton Mifflin.
Harvard
(1948). An Encyclopedia of World History : Ancient, Medieval and Modern. Boston, MA: Houghton Mifflin.
MLA
An Encyclopedia of World History : Ancient, Medieval and Modern. Boston, MA: Houghton Mifflin. 1948.
