APA (7 वां संस्करण) प्रशस्ति पत्र

Abell, A. I. The Catholic factor in urban welfare: The early period, 1850-1880. [publisher not identified].

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Abell, Aaron Ignatius. The Catholic Factor in Urban Welfare: The Early Period, 1850-1880. [Place of publication not identified]: [publisher not identified].

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Abell, Aaron Ignatius. The Catholic Factor in Urban Welfare: The Early Period, 1850-1880. [publisher not identified].

चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.