Cooper, Donald R., author
McGraw-Hill, 2008
Buku Teks
Cooper, Donald R., author
McGraw-Hill Education, 2014
Buku Teks
Ford, E. David, author
Cambridge University Press, 2000
eBooks
E. David Ford, author
Cambridge University Press, 2000
eBooks
editors, Jaber F. Gubrium, James A. Holstein
Sage, 2002
Buku Referensi