Gaya APA
NEUMAN, W, L. (1997).
SOCIAL RESEARCH METHODS: Qualitative And Quantitative Approaches .
London:
ALLYN & BACON.
Gaya MLA
NEUMAN, W., Lawrence.
"SOCIAL RESEARCH METHODS: Qualitative And Quantitative Approaches".
London:
ALLYN & BACON,
1997.
Textbook.