Abbas Tashakkori, Charles Teddlie
SAGE Publications, 2010
Buku Teks
edited by Malcolm Williams and W. Paul Vogt
Sage, 2011
Buku Teks
edited by Ladd Wheeler
Sage, 1980
Buku Teks
edited by Ladd Wheeler
Sage, 1980
Buku Teks
Sage Publications, 1981
Buku Teks