Octaviani Indrasari Ranakusuma, author
Fakultas Psikologi Universitas Indonesia, 1996
UI - Skripsi (Membership)
BAKOSURTANAL, 2008
Buku Teks
Getis, Arthur, author
McGraw-Hill Higher Education, 2009
Buku Teks
by Les Rowntree ... [and others]
Prentice-Hall, 2011
Buku Teks
Trewartha, Glenn T., author
McGraw-Hill, 1967
Buku Teks