Arevalo, C. G. (1959). Some aspects of the theology of the Mystical Body of Christ in the ecclesiology of Giovanni Perrone, Carlo Passagla and Clemens Schrader: Theologians of the Roman College in the mid-nineteenth century. Pontificiae Universitatis Gregoriana.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Arevalo, C. G. Some Aspects of the Theology of the Mystical Body of Christ in the Ecclesiology of Giovanni Perrone, Carlo Passagla and Clemens Schrader: Theologians of the Roman College in the Mid-nineteenth Century. Romae: Pontificiae Universitatis Gregoriana, 1959.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Arevalo, C. G. Some Aspects of the Theology of the Mystical Body of Christ in the Ecclesiology of Giovanni Perrone, Carlo Passagla and Clemens Schrader: Theologians of the Roman College in the Mid-nineteenth Century. Pontificiae Universitatis Gregoriana, 1959.