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..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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.