توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

National Research Council (U.S.). Highway Research Board. (1951). Highways with a narrow median: Presented at the Thirtieth Annual Meeting, 1951. Highway Research Board.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

National Research Council (U.S.). Highway Research Board. Highways with a Narrow Median: Presented at the Thirtieth Annual Meeting, 1951. Washington, D.C: Highway Research Board, 1951.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

National Research Council (U.S.). Highway Research Board. Highways with a Narrow Median: Presented at the Thirtieth Annual Meeting, 1951. Highway Research Board, 1951.