Ombak,97 Ombak70 Oxford University Press,37 Oxford University Press33 Ombak,,16 Open University Press,14 oxford8 Oxford University,5 Obor indonesia3 Open Books2 Oxford University2 Ocean Geographic2 Oxford,2 Otoritas jasa keuangan,2 Open University Press1 Obor1 Orchard Books1 Oxford University Press, Inc,1 Oriental1 Oriental,1