共 49 条
[2]
[Anonymous], 2016, SMARTPHONE OWNERSHIP
[3]
[Anonymous], 1999, J KOREAN ACAD FAM ME
[7]
Centers for Disease Control and Prevention (CDC), 2010, MMWR Morb Mortal Wkly Rep, V59, P1609
[10]
Choi Yunkyeung,, 2009, Korean Journal of Clinical Psychology, V28, P639