Verhoogen, J. (1970). Earth: An introduction to physical geology. Rinehart & winston.
Chicago-čujuhus (17. p.)Verhoogen, John. Earth: An Introduction to Physical Geology. New York: Rinehart & winston, 1970.
MLA-čujuhus (9. p.)Verhoogen, John. Earth: An Introduction to Physical Geology. Rinehart & winston, 1970.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.