Autograms

A self-referencing sentence is a sentence that describes itself. For example,

"This sentence has five words," or "This sentence contains nine syllables."

A more interesting example is,

"In this sentence the word 'and' occurs twice, the word 'eight' occurs twice, the word 'four' occurs twice, the word 'fourteen' occurs four times, the word 'in' occurs twice, the word 'occurs' occurs fourteen times, the word 'sentence' occurs twice, the word 'seven' occurs twice, the word 'the' occurs fourteen times, the word 'this' occurs twice, the word 'times' occurs seven times, the word 'twice' occurs eight times, and the word 'word' occurs fourteen times."

See  http://www.rinkworks.com/words/autograms.shtml