APA (7 वां संस्करण) प्रशस्ति पत्र

HOLMES, A. Principles of physical geology chapter XX-XXI(619-1288).-- 2nd ed. ELBS and Nelson.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

HOLMES, Arthur. Principles of Physical Geology Chapter XX-XXI(619-1288).-- 2nd Ed. London: ELBS and Nelson.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

HOLMES, Arthur. Principles of Physical Geology Chapter XX-XXI(619-1288).-- 2nd Ed. ELBS and Nelson.