
.	The following table presents our Google segment revenues by revenue source (a) (in millions):
.
.		Three Months Ended						Twelve Months Ended
.		December 31,						December 31,
.		2012		2013		2012		2013
.		(unaudited)								(unaudited)
.	Advertising revenues:
.	Google websites	$8,640		$10,551		$31,221		$37,453
.	Google Network Members' websites	3,436		3,522		12,465		13,125
.	Total advertising revenues	12,076		14,073		43,686		50,578
.	Other revenues	829		1,647		2,353		4,972
.	Google segment revenues	$12,905		$15,720		$46,039		$55,550
.	(a) In accordance with GAAP, Google segment revenues (and related percentages) are presented consistent with what is provided to the chief operating decision maker for purposes of making decisions about allocating resources to that segment and assessing its performance, and include $13 million and $31 million of revenues resulting from intersegment transactions that are eliminated in our consolidated results for the three months and twelve months ended December 31, 2013, respectively.
.
.	The following table presents our Google segment revenues, by revenue source, as a percentage of Google segment revenues (a):
.
.		Three Months Ended						Twelve Months Ended
.		December 31,						December 31,
.		2012		2013		2012		2013
.		(unaudited)								(unaudited)
.	Advertising revenues:
.	Google websites	67%		67%		68%		67%
.	Google Network Members' websites	27%		23%		27%		24%
.	Total advertising revenues	94%		90%		95%		91%
.	Other revenues	6%		10%		5%		9%
.	Google segment revenues	100%		100%		100%		100%
.	(a) In accordance with GAAP, Google segment revenues (and related percentages) are presented consistent with what is provided to the chief operating decision maker for purposes of making decisions about allocating resources to that segment and assessing its performance, and include $13 million and $31 million of revenues resulting from intersegment transactions that are eliminated in our consolidated results for the three months and twelve months ended December 31, 2013, respectively.