McKeever, S. (1993). Ensiklopedia SAINS Jilid 1 Zat. Aries lima.
Lua i Stíl Chicago (17ú heag.)McKeever, Susan. Ensiklopedia SAINS Jilid 1 Zat. Aries lima, 1993.
Lua MLA (8ú heag.)McKeever, Susan. Ensiklopedia SAINS Jilid 1 Zat. Aries lima, 1993.
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