„Webster's Revised Unabridged Dictionary (1913 + 1828)” (Part of this paragraph is public domain material copyright 1828 and 1913). Heterogeneity. The ARTFL Project, University of Chicago. September 2010. Arhivirano iz originala na datum 2011-07-28. Pristupljeno 10. 9. 2010.
„Webster's Revised Unabridged Dictionary (1913 + 1828)” (Part of this paragraph is public domain material copyright 1828 and 1913). Heterogeneous. The ARTFL Project, University of Chicago. September 2010. Arhivirano iz originala na datum 2011-07-28. Pristupljeno 10. 9. 2010.
„Webster's Revised Unabridged Dictionary (1913 + 1828)” (Part of this paragraph is public domain material copyright 1828 and 1913). Heterogeneity. The ARTFL Project, University of Chicago. September 2010. Arhivirano iz originala na datum 2011-07-28. Pristupljeno 10. 9. 2010.
„Webster's Revised Unabridged Dictionary (1913 + 1828)” (Part of this paragraph is public domain material copyright 1828 and 1913). Heterogeneous. The ARTFL Project, University of Chicago. September 2010. Arhivirano iz originala na datum 2011-07-28. Pristupljeno 10. 9. 2010.