Gaya APA
Gray, George, Guppy, Neil. (0).
Successful surveys : research methods and practice .
:
.
Gaya Chicago
Gray, George, Guppy, Neil.
Successful surveys : research methods and practice.
:
,
0.
Academic.
Gaya MLA
Gray, George, Guppy, Neil.
Successful surveys : research methods and practice.
:
,
0.
Academic.
Gaya Turabian
Gray, George, Guppy, Neil.
Successful surveys : research methods and practice.
:
,
0.
Academic.