Gaya APA
Steward, David W. (2007).
Focus groups : Theory & practice .
London:
Sage Publications.
Gaya Chicago
Steward, David W.
Focus groups : Theory & practice.
London:
Sage Publications,
2007.
Text.
Gaya MLA
Steward, David W.
Focus groups : Theory & practice.
London:
Sage Publications,
2007.
Text.
Gaya Turabian
Steward, David W.
Focus groups : Theory & practice.
London:
Sage Publications,
2007.
Print.