APA (7 वां संस्करण) प्रशस्ति पत्र

Vallen, J. J. (1985). Check in check out: Principles of effective front office management (3rd ed.). Wm.C. Brown.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Vallen, Jerome J. Check in Check Out: Principles of Effective Front Office Management. 3rd ed. Dubuque, Iowa: Wm.C. Brown, 1985.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Vallen, Jerome J. Check in Check Out: Principles of Effective Front Office Management. 3rd ed. Wm.C. Brown, 1985.