I'm doing a summary in an article of two authors and every sentence needs an attributive tag, but no where in the article does it say when which author is saying what. what attributive tag can i use ?

hancock was president of congress when the declaration of independence was adopted and signed. he is primarily remembered by americans for his large, flamboyant signature on the declaration, so much so that "john hancock" became, in the united states, an informal synonym for signature.

explanation:

the chivalry's most valued code is morality