Rujukan Joe Biden

Barone, Michael (2005). Almanac of American Politics. Washington: National Journal Group. ISBN 0892341122. Parameter |coauthors= tidak diketahui diabaikan (guna |author=) (bantuan)
Boyer, William W. (2000). Governing Delaware. Newark, DE: University of Delaware Press. ISBN 0874137217.
Cohen, Celia (2002). Only in Delaware, Politics and Politicians in the First State. Newark, DE: Grapevine Publishing. ISBN B0006S3PP8 Check |isbn= value: invalid character (bantuan).
Peirce, Neil R. (1977). Mid-Atlantic States of America. New York: W.W. Norton & Co. ISBN 0393055418. Parameter |coauthors= tidak diketahui diabaikan (guna |author=) (bantuan)

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