The Encyclopedia of structural geology and plate tectonics
edited by Carl K. Seyfert
Van Nostrand Reinhold, 1987
 Buku Referensi
Encyclopedia of applied psychology
editor-in-chief Charles D. Spielberger
Hershey, 2004
 Buku Teks SO
Montgomery, Carla W.
Fundamentals of geology
Wm. C. Brown , 1989
 Buku Teks
Plummer, Charles C.
Physical geology
WBC, 1991
 Buku Teks
Montgomery, Carla W.
Environmental geology
McGraw-Hill, 2003
 Buku Teks