APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.