(Inggris) Anthony JF Griffiths, Jeffrey H Miller, David T Suzuki, Richard C Lewontin, and William M Gelbart (2000). An Introduction to Genetic Analysis. University of British Columbia, University of California, Harvard University (edisi ke-7). W. H. Freeman. hlm. Properties of RNA. ISBN0-7167-3520-2. Diakses tanggal 2010-08-24.Pemeliharaan CS1: Banyak nama: authors list (link)