Using the harvard method rewrite the following literary works.
a. the title of the book is economics and managament sciences written by mm byrne in 2010 and published in pretoria at the university of south africa.
b. an article titled"research methods in economics"written by tom nunan andsusan walker in 2014. and published in the journal for economics in volume 2,issue 3. the article is from page 113 to 150

A. 
Harvard Referencing a book typically goes: [Author Surname], [Author Initial]. ([Year Published]). [Title]. ed. [City]: [Publisher], p.[Pages Used].

All you have to do is fill in the gaps: 
Byrne, MM (2010). Economics and Management Sciences . Pretoria: University of South Africa. p.[Pages Used].

I don't know which pages you are referencing, so I included the template, which you can easily replace. You could always comment the pages, in which case I can do it for you. 
b. 
[Author Surname], [Author Initial.] ([Year Published]) [Title].[Publication Title], [Volume number]([Issue number]), [Pages Used]. 

All you have to do now is fill in the gaps: 

Nuna, T and Walker, S . (2014). Research methods in Economics.Journal for Economics. 2 (3), 113 - 150.