Draper, E. G. (1918). Lectures in navigation: Prepared for use as a text book at the Officer's material school, Naval auxiliary reserve.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Draper, Ernest Gallaudet. Lectures in Navigation: Prepared for Use as a Text Book at the Officer's Material School, Naval Auxiliary Reserve. [Pelham Bay? N. Y, 1918.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Draper, Ernest Gallaudet. Lectures in Navigation: Prepared for Use as a Text Book at the Officer's Material School, Naval Auxiliary Reserve. 1918.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.