Cita APA (7a ed.)
(1988). World book of America's presidents: Obs. The president's world, 158 s.. Portraits of the presidents, 288 s (1.vyd.). The World Book,Inc.
Cita Chicago Style (17a ed.)
World Book of America's Presidents: Obs. The President's World, 158 S.. Portraits of the Presidents, 288 S. 1.vyd. Chicago: The World Book,Inc, 1988.
Cita MLA (9a ed.)
World Book of America's Presidents: Obs. The President's World, 158 S.. Portraits of the Presidents, 288 S. 1.vyd. The World Book,Inc, 1988.
Precaución: Estas citas no son 100% exactas.