Academics struggle to determine correct citation requirements when sources overlap or build on each other

Researchers and students face confusion about citation standards when multiple sources contain the same information, particularly when newer sources cite older ones they've already cited. Current citation guides (APA, MLA, Chicago) don't clearly address retroactive citation obligations, forcing academics to make uncertain decisions that could affect their credibility or grade. This ambiguity creates anxiety and wastes time on research methodology rather than actual research.