请问on newspapers与in newspapers的区别

Question

请问on newspapers与in newspapers的区别，回答最好有参考资料和例句，谢谢。
注：有的人说on在表面上，但我见到报纸上的新闻也用on的，所以不懂，请高手指教
希望能引用资料，如果回答好还可以加5分，谢谢

Answer 1

on表示一种方式，有通过报纸的意思。
My company already has advertising done on newspapers and magazines, do I still need online advertising?
我们公司已经在报刊杂志上作了广告，还需要通过网络做广告吗？
Nowadays, more and more advertisements appear on newspapers,broadcasts, magazines as well as streets. People have different views on advertisements.
现在越来越多的广告出现在报纸、广播、杂志甚至街头，人们对此有不同的看法。

in newspapers可以译为报纸上，指报纸的内容
One should discredit a good deal of what is printed in newspapers.
应该要怀疑报纸上所登的许多东西。

newspapers总称报纸。关于两者区别的资料没找到。
http://zhidao.baidu.com/question/12709355.html
有道给出了in newspapers的意思，on newspapers只有例句。看来in newspapers更正规。其实差别很细微。平常按常规来就可以了。比如
Is there something interesting in today's newspaper?
今天的报纸说什么有趣的东西了没？
What's on the newspaper?
报纸上放着什么？

Answer 2

没什么本质上的差别，不要太去刻意。