Pinkwater, D. M., & Johnson, D. B. (2008). Bear's picture (1st Houghton Mifflin ed.). Houghton Mifflin Company.
Lua i Stíl Chicago (17ú heag.)Pinkwater, Daniel Manus, agus D. B. Johnson. Bear's Picture. 1st Houghton Mifflin ed. Boston: Houghton Mifflin Company, 2008.
Lua MLA (8ú heag.)Pinkwater, Daniel Manus, agus D. B. Johnson. Bear's Picture. 1st Houghton Mifflin ed. Houghton Mifflin Company, 2008.
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