Gaya APA

Neuman, W, L. (2013). Social Research Methods: Qualitative and Quantitative Approaches . Harlow, Essex, Inggris: Pearson Education Limited (UK).

Gaya MLA

Neuman, W., Lawrence. "Social Research Methods: Qualitative and Quantitative Approaches". Harlow, Essex, Inggris: Pearson Education Limited (UK), 2013. Text.