I'm assuming that you want this in the form of Harvard Referencing.
[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.