.

The following table presents our revenues by revenue source (in millions):

.

.

  Three Months Ended

.

March 31,

.

  2013 2014

.

(unaudited)

.

Advertising revenues:

.

Websites $8,640 $10,469

.

Network Members' websites 3,262 3,397

.

Total advertising revenues 11,902 13,866

.

Other revenues 1,049 1,554

.

Total revenues $12,951 $15,420

.

.

The following table presents our revenues, by revenue source, as a percentage of total revenues:

.

.

Three Months Ended

.

March 31,

.

2013 2014

.

(unaudited)

.

Advertising revenues:

.

Websites 67% 68%

.

Network Members' websites 25% 22%

.

Total advertising revenues 92% 90%

.

Other revenues 8% 10%

.

Total revenues 100% 100%