MeKeever, S. (2011). Ensiklopedi SAINS. Penebar Swadaya.
Lua i Stíl Chicago (17ú heag.)MeKeever, Susan. Ensiklopedi SAINS. Penebar Swadaya, 2011.
Lua MLA (8ú heag.)MeKeever, Susan. Ensiklopedi SAINS. Penebar Swadaya, 2011.
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