APA (7 वां संस्करण) प्रशस्ति पत्र

Pfeiffer, W. S., & Keller, C. H. (2000). Proposal writing: The art of friendly and winning persuasion. Prentice Hall.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Pfeiffer, William S., और Charles H. Keller. Proposal Writing: The Art of Friendly and Winning Persuasion. Upper Saddle River, NJ: Prentice Hall, 2000.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Pfeiffer, William S., और Charles H. Keller. Proposal Writing: The Art of Friendly and Winning Persuasion. Prentice Hall, 2000.