Russian constructions that express source of information

Do you know that in Russian there are a lot of constructions that express source of information?

For example,

по-моему (мнению) – in my opinion
на мой взгляд – in my opinion
по мнению + Genitive – according to
по сообщению + Genitive – by message of
с точки зрения + Genitive – in terms of
по словам + Genitive – as said by
По мнению известной актрисы, сценарий написан очень профессионально. According to the famous actress, the script is written very professionally.