Maas, O. (1938). Franciscans in the Middle Kingdom: A survey of Franciscan missions in China from the Middle Ages to the present time. Collectanea Commiss. Synodal..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Maas, Otto. Franciscans in the Middle Kingdom: A Survey of Franciscan Missions in China from the Middle Ages to the Present Time. Peking: Collectanea Commiss. Synodal., 1938.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Maas, Otto. Franciscans in the Middle Kingdom: A Survey of Franciscan Missions in China from the Middle Ages to the Present Time. Collectanea Commiss. Synodal., 1938.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.