To reference a website: In your essay: A blog (a contraction of the term "web log")[1]

In your reference list:
:, Blood Weblogs: A History And Perspective, Becky Donlo, Date retrieved: September 7, 2000.
Website, Title, Author, Date written or date retrieved

To reference a book: In your essay : Some blogs focus on a particular subject, such as political blogs, travel blogs (also known as travelogs), house blogs,[2]
In your reference list:

Hun, Douglas, 1997, The Greatest Blogs. Chicago: Triumph Books.
Last Name, First Name (author), date published, Name of book, Publishing company city: Publishing company name.