Overs, W. H. (1927). Sketches in ebony and ivory. Pub. for the National Council of the Protestant Episcopal Church by Church Missions Pub. Co..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Overs, Walter H. Sketches in Ebony and Ivory. Hartford, Conn.: Pub. for the National Council of the Protestant Episcopal Church by Church Missions Pub. Co., 1927.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Overs, Walter H. Sketches in Ebony and Ivory. Pub. for the National Council of the Protestant Episcopal Church by Church Missions Pub. Co., 1927.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.