The Whole Truth About Fatima Volumes I, II & III:
by Frere Michel, English Translations of the hard-to-find 1980's Originals
The Real Sister Lúcia's statement concerning the Real Holy Trinity can be found in The Whole Truth About Fatima Volume II on page 464.
These three volumes seem to contain accounts from both the Real Sister Lúcia and her post-1959 impostor. For more information on the Vatican's murder of the Real Sister Lúcia of Fatima, please review the section: The Impostor Sister Lucy.