Ellul, Michael (December 2004). "Fort St. Angelo". Cottonera Waterfront Regeneration Project. Retrieved 16 July 2015.
gov.mt
culturalheritage.gov.mt
"Grunenburg low battery - Valletta"(PDF). National Inventory of the Cultural Property of the Maltese Islands. 28 June 2013. Archived from the original(PDF) on 13 July 2015. Retrieved 16 July 2015.
"Fort St Angelo"(PDF). National Inventory of the Cultural Property of the Maltese Islands. 28 June 2013. Archived from the original(PDF) on 18 May 2015. Retrieved 16 July 2015.
"Grunenburg low battery - Valletta"(PDF). National Inventory of the Cultural Property of the Maltese Islands. 28 June 2013. Archived from the original(PDF) on 13 July 2015. Retrieved 16 July 2015.
"Fort St Angelo"(PDF). National Inventory of the Cultural Property of the Maltese Islands. 28 June 2013. Archived from the original(PDF) on 18 May 2015. Retrieved 16 July 2015.