ERD for library system

dear sir;
i need ur help, im studying database on self study bases, and im designing 
library system in databse, just the checkin and check out system which 
invloved students/patrons, i need ur help ,
im includeing students, books info, loan and hold books, authot and fine 
calcultaion on books, please send me normazlied ERD for this,
i will reamin thankful to u,
please reply me soon as posible, i have been working for over a month, 
please, help me
bye and take care
Shahab!

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