There are so many ways to cite, its hard to tell.
I wouldnt put the sources at the end of each paragraph, especially if you have more than one in the same paragraph. Some ideas in the paragraph might be yours, other not. You might draw logical conclusions in the form of
If this, then this, which were not directly in the source your worked with. Its going to be hard to tell which is which from an external point of view. You want to be clear about whats from your head, and whats from the book you read.
And I wouldnt put, at the end of each sentence that requires a source, the indication of the page, author, year, etc. Thats too much, as you mentioned. Well, for a direct quote, the page on which you took it is important and I would add it (e.g. Walter, 2000, p.15). But for paraphrasing, there are moments when you can not identify the idea to a specific page cause its not written, its more like an idea thats been in the background for the whole book. (e.g. You are working on a biography, and you say that X dude is a piece of sh** for some reasons, but at no point in the book does it say this so you cant refer to any pages, and you can not say that it was your idea, cause its what the book, in essence, was saying, it just wasnt explicit. So its neither from your head nor from a specific page. In such a case, only the author and the year is enough if you ask me)
How many different sources do you have?
If you only have one? F* this, just mention the author or the text as you are writing, parentheses not needed, it doesnt matter. Put the complete reference at the end, its all that matters. This doesnt seem to be your case though.
If you have something like 2 or 3, which are not from the same author, I would just put in parentheses the name of the author and the year when needed. e.g. (Walter, 2000). You can then add a bibliography at the end of your work with the completed informations.
If you have a bunch of sources, you dont want to fill your pages with parentheses, author's name, etc. I usually do footnotes, which send the reader back to the complete reference, either at the bottom of the page or at the end of your work. Look on the internet for guides on footnotes if you want.
If that doesnt help, just google ''how to cite'' or something and you should get good infos
