Berg, D. W., & Duane, D. B. (1968). Effect of particle size and distribution on stability of artificially filled beach, Presque Isle Peninsula, Pennsylvania. U.S. Coastal Engineering Research Center.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Berg, Dennis W., و David B. Duane. Effect of Particle Size and Distribution on Stability of Artificially Filled Beach, Presque Isle Peninsula, Pennsylvania. [Washington]: U.S. Coastal Engineering Research Center, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Berg, Dennis W., و David B. Duane. Effect of Particle Size and Distribution on Stability of Artificially Filled Beach, Presque Isle Peninsula, Pennsylvania. U.S. Coastal Engineering Research Center, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.