Abbas Tashakkori, Charles Teddlie
SAGE Publications, 2010
Buku Teks
Barros, Alistair, editor
Springer, 2012
eBooks
edited by Andrew Stevens ... [and others]
Sage Publications, 2001
Buku Referensi
chief editor, Walter Ledermann
John Wiley & Sons, 1980
Buku Referensi
edited by Carl E. Pearson
Van Nostrand Reinhold Co., 1974
Buku Referensi