==References==* Blatt, Harvey and Robert J. Tracy, 1996, "Petrology: Igneous, Sedimentary and Metamorphic", 2nd ed., Freeman, ISBN 0-7167-2438-3
==Tham khảo==* Blatt, Harvey and Robert J. Tracy, 1996, "Petrology: Igneous, Sedimentary and Metamorphic", 2nd ed., Freeman, ISBN 0-7167-2438-3