You can enter references through Google Academic, search the documents and click the quotation marks below the title of the article. When you open the reference box, there will be references in various formats, and most of them can see the year, volume, period and page number (some documents have no page number, only the article number):

The first document:

The second document:

Chinese literature can be retrieved through Baidu academic input reference. After searching the literature, click the title of the article to open the literature, which will link to the source of the literature. For example, the fourth document is in the VIP database, and the source is found: