"ARLHS World List of Lights (WLOL)". Identification Codes. Merchantville, New Jersey: Amateur Radio Lighthouse Society/The Weidner Publishing Group. 2003. Retrieved 18 August 2017.
faroisdeportugal.com
Parreira., João. "Farol da Guia". Farois de Portugal. Archived from the original on 12 August 2017. Retrieved 18 August 2017.