1. McCarthy, M., 2005. Ship's Fastenings: from sewn boat to steamship. Texas A&M Press, 2005.
2. Sawyer, L.A. and Mitchell, W.H. 1985. The Liberty Ships: The History of the “Emergency” Type Cargo Ships Constructed in the United States During the Second World War, pp. 7-10, 2nd Edition, Lloyd's of London Press Ltd., London, England, 1985.
3. Lixing Zou, 2009. Development oriented finance and economy in China: A historical review and prognostic assessment. Printed in Bloomington, Indiana, USA, 2009.
4. Michael Dillon, 2010. China: A modern history, I B Tauris and Co Ltd, London, UK, 2010.
5. Merchant Marine Act of 1920; also known as the Jones Act, is a United States federal statute; en.wikipedia.org/wiki/Merchant Marine Act of 1920.