Politeknik Ilmu Pelayaran,4 International Maritime Organization,2 The Nautical Institute,2 Elsevier,2 Fairplay Publications,2 Semanship International,1 Pustaka Beta,1 Marine Design And Research,1 Clarkson,1 International Mariners Management Association Of Jepan (IMMAJ),1 Politeknik Ilmu Pelayaran Makassar,1 Hurst and Blackett,1 Refika Aditama,1 University Of Texas,1 Humas Ditjen Perhubungan Laut Departemen Perhubungan,1 Deepublish,1 Pitman Publishing Pty, Ltd,1 Institute Of Chartered Shipbrokers,1 Bloomsbury,1 Maritim,1