APA (7th ed.) Citation

National geographic society, Washington, D. C. (1923). The capital of our country. National geographic society.

Chicago Style (17th ed.) Citation

National geographic society, Washington, D. C. The Capital of Our Country. Washington, D.C: National geographic society, 1923.

MLA (9th ed.) Citation

National geographic society, Washington, D. C. The Capital of Our Country. National geographic society, 1923.