APA Style
Kamil, Jill, Singer, Hans W.. ().
Rich and poor countries .
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Chicago Style
Kamil, Jill, Singer, Hans W..
Rich and poor countries.
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,
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.
MLA Style
Kamil, Jill, Singer, Hans W..
Rich and poor countries.
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,
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.
Turabian Style
Kamil, Jill, Singer, Hans W..
Rich and poor countries.
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,
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.