Gaya APA
Pearson, Clifford A. ().
Bill and Melinda Gates Foundation. Seattle .
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Gaya Chicago
Pearson, Clifford A.
Bill and Melinda Gates Foundation. Seattle.
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Text.
Gaya MLA
Pearson, Clifford A.
Bill and Melinda Gates Foundation. Seattle.
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Text.
Gaya Turabian
Pearson, Clifford A.
Bill and Melinda Gates Foundation. Seattle.
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.
Print.