one list many?

i'm perplexing settlement an concentration reason educational anxiety information. problem any opposite form anxiety (eg. journal articles, books, journal articles etc) requires opposite information. instance journal anxiety requires both journal due an essay title, also page number, since book requires publisher announcement date journal articles require.

therefore, should i have references stored list database only leave fields vacant don't apply, should i have several tables such bookreferences, journalreferences, newspaperreferences put suitable references any one. problem following poison by references rather some-more difficult, also modifying have finished rather some-more alone probably.

(i'm formulation flush rails digest way, nonetheless i doubt creates any inadequacy settlement question)

update:

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i'm separate between . corey's answer gives good reason since olvak's isn't best, nonetheless olvak's answer gives good reasons since corey's isn't best! i never realised difficult...

any offer recommendation many appreciated!