Hi

I often create my ebooks myself, exporting documents by W2epub and optimize by Sigil.
I know two ways of inserting a picture in epub, these: by a <div> or <p>. Let's suppose I want it to centred in my page. So, I can put in my css:
1)
Code:
div.picture {
text-align: center;
}
2)
Code:
p.picture {
text-align: center;
}
maybe as a blockquote element.
So, I found out that the DIV code works well in either kindle or kobo, while tolino requires P. Otherwise the image won't be showed in the middle.
I ask you, is it a correct behaviour?
Which of the two solutions should I use?