International family planning perspectives
 Majalah, Jurnal, Buletin
Murdoch, Anna
Family business
Morrow, 1988
 Buku Teks SO
Inderbitzin, Michelle Lee
Perspectives on deviance and social control
SAGE, 2015
 Buku Teks
Gunzburger, Max D.
Perspectives in flow control and optimization
Society for Industrial and Applied Mathematics, 2003
 eBooks
Bearden, James H.
The environment of business : perspectives and viewpoints
Holt, Rinehart and Winston , 1969
 Buku Teks