@article{oai:tsukuba.repo.nii.ac.jp:00007470,
 author = {Yukawa, Shintaro and Yoshida, Fujio},
 journal = {筑波大学心理学研究, Tsukuba Psychological Research},
 month = {Feb},
 pages = {59--78},
 title = {The differences between watching and playing violent video games : The effects of play style and game impression on aggression-related reactions},
 volume = {33},
 year = {2007}
}