King, K., & Ball, D. (1989). A holistic approach to accident and injury prevention in children's playgrounds. LSS.
Lua i Stíl Chicago (17ú heag.)King, Karen, agus David Ball. A Holistic Approach to Accident and Injury Prevention in Children's Playgrounds. London: LSS, 1989.
Lua MLA (8ú heag.)King, Karen, agus David Ball. A Holistic Approach to Accident and Injury Prevention in Children's Playgrounds. LSS, 1989.
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