how do you have to handle referencing/ citations in the following scenario:
In the first paragraph of a section, a concept A is introduced with a citation. In the following paragraph, another concept B is introduced.
Then in the third paragraph, both concepts are mentioned again (for example, to combine both to a concept C). Do you have to add a reference after both concepts again?
(1) "Combining concept A (Author S, date, p. XXX) and concept B (Author P, date, p. XX), a concept C supports the argument ..."
(2) "Combining concept A and concept B, ..."
Which approach is correct? If none, how shall this be done?