Douglas, W. (1921). The relation of church music to ecclesiastical architecture: An address before the Music Teachers' National Association in St. Paul's Cathedral, Detroit, Dec. 29, 1921. S.I..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Douglas, Winfred. The Relation of Church Music to Ecclesiastical Architecture: An Address Before the Music Teachers' National Association in St. Paul's Cathedral, Detroit, Dec. 29, 1921. S.I., 1921.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Douglas, Winfred. The Relation of Church Music to Ecclesiastical Architecture: An Address Before the Music Teachers' National Association in St. Paul's Cathedral, Detroit, Dec. 29, 1921. S.I., 1921.
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