National geographic society, Washington, D. C. (1923). The capital of our country. National geographic society.
芝加哥风格引文National geographic society, Washington, D. C. The Capital of Our Country. Washington, D.C: National geographic society, 1923.
MLA引文National geographic society, Washington, D. C. The Capital of Our Country. National geographic society, 1923.
警告：这些引文格式不一定是100％准确.