Citation reference

[Roberto Bernetti]

Hi
I should change the format of the citation reference from brackets and bold 
character to parenthesys and normal character. How can I get it ?
Thanks in advance
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Roberto Bernetti                             e-mail: [EMAIL PROTECTED]
V. S.da Vecchia del Pinocchio 1/A    
60131 ANCONA
tel/fax 071 2867103