Gerard Guthrie. Basic Research Methods: An Entry to Social Science Research. SAGE.
Citazione stile Chigago Style (17a edizione)Gerard Guthrie. Basic Research Methods: An Entry to Social Science Research. SAGE.
Citatione MLA (8a ed.)Gerard Guthrie. Basic Research Methods: An Entry to Social Science Research. SAGE.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.