selection formula by month and year

ReportFotocopy.CrystalReportViewer1.SelectionFormula = "DatePart('m','yyyy', {Tabel_Fotocopy.Tanggal}) =&" + Month + "/" + Tahun.Text + "&"

i try with using And

ReportFotocopy.CrystalReportViewer1.SelectionFormula = "DatePart('m', {Tabel_Fotocopy.Tanggal}) =" + Month +"And"+  "DatePart('yyyy', {Tabel_Fotocopy.Tanggal}) =" + Tahun.Text

both give me error