D Schultheiss: Long-term motivations to play MMOGs: A longitudinal study on motivations, experience and behavior, page 344.
웹 기반 온라인 게임 대규모 다중 사용자 온라인 게임 HTML D Schultheiss: Long-term motivations to play MMOGs: A longitudinal study on motivations, experience and behavior, page 344.