APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.