Gaya APA
NEUMAN, W, L. (2014).
SOCIAL RESEARCH METHODS: QUALITATVE AND QUANTATIVE APPROACHES .
EDINBURGH GATE:
PEARSON EDUCATION LIMITED.
Gaya MLA
NEUMAN, W., LAWRENCE.
"SOCIAL RESEARCH METHODS: QUALITATVE AND QUANTATIVE APPROACHES".
EDINBURGH GATE:
PEARSON EDUCATION LIMITED,
2014.
Text.