My References:

1. bubble sort: http://en.wikipedia.org/wiki/Bubble_sort
2. insertion sort:  http://en.wikipedia.org/wiki/Insertionsort
3. shell sort: http://en.wikipedia.org/wiki/Shell_sort
4. heap sort: http://en.wikipedia.org/wiki/Heap_sort
5. merge sort: http://en.wikipedia.org/wiki/Merge_sort
6. quick sort: http://en.wikipedia.org/wiki/Quick_sort
7. bucket sort: http://en.wikipedia.org/wiki/Bucket_sort