Germann, A.C., author
C.C. Thomas, 1971
Buku Teks
Martin, Susan Ehrlich, author
Sage Publications, 2007
Buku Teks
Arrigo, Bruce A., author
West/Wadsworth, 1999
Buku Teks
Robinson, Darryl, author
Cambridge University Press, 2020
eBooks
Roberson, Cliff, author
CRC Press, Taylor & Francis Group, 2008
Buku Teks