Posavac, Emil J.
Prentice Hall Inc., 1980
Buku Teks
Russell Sage Foundation, 1971
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Alkin, Marvin C., author
Sage, 1985
Buku Teks
Muhammad Farrasy Ammar, author
Fakultas Kedokteran Universitas Indonesia, 2020
UI - Skripsi (Membership)
The Urban Institute, 1975
Buku Teks