Maps.com (Firm) & ebrary, Inc. (2000). Ratification of the Constitution, 1787-1790. Maps.com.
芝加哥风格引文Maps.com (Firm) 与 Inc ebrary. Ratification of the Constitution, 1787-1790. [S.l.]: Maps.com, 2000.
MLA引文Maps.com (Firm) 与 Inc ebrary. Ratification of the Constitution, 1787-1790. Maps.com, 2000.
警告：这些引文格式不一定是100％准确.