IFE and EFE, they only evaluate extenal factor or internal factor indipenently, and there is no relation with them they are for a distictm and uniqu perpose to studay the external environment or the internal environment.
where as SWOT analysis helps in relating the interanl factor with that of extenal factors, it consideres that factor that effect the internal business, as the same suggests its analysis of Strenths and weakness of an organisation and looking for an Opertuanitys and related Tthereats for the same to be able to be competent in the businss or market.
hope it gives you an idea of difference
i shall refer the books and let you know if possible at the arelieat
john