APA Style

Langer, William L. (ed). (1972). An Encyclopedia of World History: Ancient, Medieval and Modern (Fifth edition/revised). Boston: Houghton Mifflin Co..

Chicago Style

Langer, William L. (ed). An Encyclopedia of World History: Ancient, Medieval and Modern. Fifth edition/revised Boston: Houghton Mifflin Co., 1972. Text.

MLA Style

Langer, William L. (ed). An Encyclopedia of World History: Ancient, Medieval and Modern. Fifth edition/revised Boston: Houghton Mifflin Co., 1972. Text.

Turabian Style

Langer, William L. (ed). An Encyclopedia of World History: Ancient, Medieval and Modern. Fifth edition/revised Boston: Houghton Mifflin Co., 1972. Print.