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Harris,Nancy, Mitten,Luana. (2009). Rourke's World of Science Encyclopedia Vol 9 : Technology . Florida: Rourke Publishing.

Gaya Chicago

Harris,Nancy, Mitten,Luana. Rourke's World of Science Encyclopedia Vol 9 : Technology. Florida: Rourke Publishing, 2009. Text.

Gaya MLA

Harris,Nancy, Mitten,Luana. Rourke's World of Science Encyclopedia Vol 9 : Technology. Florida: Rourke Publishing, 2009. Text.

Gaya Turabian

Harris,Nancy, Mitten,Luana. Rourke's World of Science Encyclopedia Vol 9 : Technology. Florida: Rourke Publishing, 2009. Print.