$1!QH!Ze!Na!RA (B

$1!0q!?}!4g (B, $1!1@!Z8!]p (B : $1!K} (Bfoursquare $1!K7!WD!]f!+5!0^!C^!5" (B by: (Language materials, printed)

$1!Na!0^!QH!Of!0d!_7!^i!1i!QN!Qu!0=!N7!ON (B = The research of interpersonal relationship retention in social network : $1!0w (BFacebook $1!IQ!1N (B; to use Facebook as an example by: (Language materials, printed)

$1!QH!Ze!Na!RA (B

$1!`V!:v!^i!1i!P'!KH (B

$1!QH!Ze!WD!]f (B

$1!0d!_7!^i!1i (B