United States. Congress. House. Committee on Roads. (1925). The old Oregon trail: Hearings before the Committee on Roads, House of Representatives, Sixty-eighth Congress, second session, on H.J. Res. 232, H.J. Res. 328, and S. 2053. January 23, February 13, 19, and 21, 1925 .. U.S. Govt. Print. Off..
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)United States. Congress. House. Committee on Roads. The Old Oregon Trail: Hearings Before the Committee on Roads, House of Representatives, Sixty-eighth Congress, Second Session, on H.J. Res. 232, H.J. Res. 328, and S. 2053. January 23, February 13, 19, and 21, 1925 .. Washington: U.S. Govt. Print. Off., 1925.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)United States. Congress. House. Committee on Roads. The Old Oregon Trail: Hearings Before the Committee on Roads, House of Representatives, Sixty-eighth Congress, Second Session, on H.J. Res. 232, H.J. Res. 328, and S. 2053. January 23, February 13, 19, and 21, 1925 .. U.S. Govt. Print. Off., 1925.