- Margaret Peterson Haddix. Among the Hidden. New York City: Simon & Schuster Books for Young Readers, 1998.
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"READ" poster of Author Margaret Peterson Haddix from the State Library of Ohio.
https://library.ohio.gov/poster/author-margaret-peterson-haddix/
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Video interview of Margaret Peterson Haddix from Reading Rockets.
http://www.readingrockets.org/books/interviews/haddix
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Feng, Wang; Yong, Cai; Gu, Baochang (2012). "Population, Policy, and Politics: How Will History Judge China's One-Child Policy?" (PDF). Population and Development Review. 38: 115–29.
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Thomas Malthus. An Essay on the Principle of Popluation. 1798.
- Rachel . "Book Review: Among the Hidden." Dallas Public Library . 12/17/2011. 4/27/2018. <http://dallaslibrary2.org/blogs/bookedSolid/2011/12/book-review-among-the-hidden-by-margaret-peterson-haddix/>.
- "Shadow Children wiki." wikia.com. 4/26/2018. 4/27/2018. <http://shadowchildren.wikia.com/wiki/Category:Shadow_Children>.
- Cynthia Leitich Smith. "Author Interview: Margaret Peterson Haddix on Found (The Missing: Book 1)." http://cynthialeitichsmith.blogspot.com. 4/22/2008. 4/27/2018. <http://cynthialeitichsmith.blogspot.com/2008/04/author-interview-margaret-peterson.html>.
- Margaret Peterson Haddix. "About the Author." 7/19/2018. <http://haddixbooks.com/about/bio/>.
Among the Hidden
