APA (7 वां संस्करण) प्रशस्ति पत्र

SPENCER DONALD D. (1985). LEARNING BASIC FOR MICROCOMPUTERS: A WORKTEXT FOR THE IBM. CHARLES E MERRILL PUBLISHING COMPANY.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

SPENCER DONALD D. LEARNING BASIC FOR MICROCOMPUTERS: A WORKTEXT FOR THE IBM. LONDON: CHARLES E MERRILL PUBLISHING COMPANY, 1985.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

SPENCER DONALD D. LEARNING BASIC FOR MICROCOMPUTERS: A WORKTEXT FOR THE IBM. CHARLES E MERRILL PUBLISHING COMPANY, 1985.