Suppose paper 1 establishes that roses are red, and cites paper 2 for the statement that violets are blue. Apart from the blueness of violets, no other results from paper 2 are relevant for paper 1, nor for my own essay.
How should my essay refer to these two assertions?
I see three possible options:
- Citing the primary source for each statement: Roses are red. Violets are blue.
- Citing each relevant source for each statement: Roses are red. Violets are blue.[1,2]
- Downgrading the second statement to a secondary citation: Roses are red. 2 had earlier established that violets are blue.
Is there a generally accepted preference for one of these?