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..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMaas, 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.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMaas, 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.
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