M. C. HOWATSON and IAN CHILVERS. "Hasdrubal." The Concise Oxford Companion to Classical Literature. 1996. Encyclopedia.com. 29 Nov. 2009 <http://www.encyclopedia.com>.
M. C. HOWATSON and IAN CHILVERS. "Hasdrubal." The Concise Oxford Companion to Classical Literature. 1996. Encyclopedia.com. (November 29, 2009). http://www.encyclopedia.com/doc/1O9-Hasdrubal.html
M. C. HOWATSON and IAN CHILVERS. "Hasdrubal." The Concise Oxford Companion to Classical Literature. 1996. Retrieved November 29, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O9-Hasdrubal.html