1. Abrahamson, B.J. International Ocean Shipping: Current Concepts and Principles, West view Press, Inc. Boulder, Colorado, 1980;.
2. Loudon, David L. Della, Bitta and Albert, J., Consumer Behavior, Fourth Edition, Mc Graw-Hill, Inc, New York, 1993;.
3. Papacotas, C.S. and Prevendouros, P.D. Transportation Engineering and Planning, 2nd ed. Prentice Hall, New Jersey, 1993.
4. The Safety of Live At Sea (SOLAS) Convention, 1974.
5. Marine Protocol 1973/1978.