APA (7 वां संस्करण) प्रशस्ति पत्र

Edited by Swallow, R. A. (1989). Clark's positioning in radigraphy (11th ed.). CBS.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Edited by Swallow, R. A. Clark's Positioning in Radigraphy. 11th ed. Delhi: CBS, 1989.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Edited by Swallow, R. A. Clark's Positioning in Radigraphy. 11th ed. CBS, 1989.