Replace the yourblog.blogspot.com to your blog address and copy the button code you like and paste it in your template.
If you want in sidebar.. go to Layout » Add a gadget » html/javascript and paste the code and save it.
Type 1 :

yourblog.blogspot.com">
Type 2 :

yourblog.blogspot.com">
Type 3 :

yourblog.blogspot.com">
pakar seo · 295 weeks ago
Agree. We must read this article more deeply in here . peluang usaha | jasa review | jasa penulis artikel | jasa content placement