APA (7 वां संस्करण) प्रशस्ति पत्र

Stokes, W. L. (1966). Essentials of earth history: An introduction to historical geology. Prentice-Hall.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Stokes, William Lee. Essentials of Earth History: An Introduction to Historical Geology. Englewood Cliffs, NJ: Prentice-Hall, 1966.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Stokes, William Lee. Essentials of Earth History: An Introduction to Historical Geology. Prentice-Hall, 1966.