APA (7 वां संस्करण) प्रशस्ति पत्र

Schellong, A. (2008). Citizen relationship management: A study of CRM in government. Lang.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Schellong, Alexander. Citizen Relationship Management: A Study of CRM in Government. Frankfurt am Main: Lang, 2008.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Schellong, Alexander. Citizen Relationship Management: A Study of CRM in Government. Lang, 2008.