APA (7th ed.) Citation

Bone, R. G. (1939). Visual outline of ancient history. Green and Co.

Chicago Style (17th ed.) Citation

Bone, Robert Gehlmann. Visual Outline of Ancient History. New York: Green and Co, 1939.

MLA (9th ed.) Citation

Bone, Robert Gehlmann. Visual Outline of Ancient History. Green and Co, 1939.