HOWARD, Mark. Robert Steele and Company: Shipbuilders of Greenock. The Northern Mariner / Le marin du nord, [S. l.], v. 2, n. 3, p. 17–29, 1992. DOI: 10.25071/2561-5467.798. Disponível em: https://tnm.journals.yorku.ca/index.php/default/article/view/798. Acesso em: 8 jan. 2025.