“Assessing the Quality of Ship Crew Members in Sewage Pollution Prevention Practices on Marine Environmental Protection: A Case of Dar Es Salaam – Zanzibar Ropax Vessels”, Soc. sci. humanities j., vol. 8, no. 10, pp. 5259–5268, Oct. 2024, doi: 10.18535/sshj.v8i10.1354.