Retnowulan Sutantio, author
Mandar Maju, 1989
Buku Teks
Retnowulan Sutantio, author
Mandar Maju, 2009
Buku Teks
Universitas Indonesia, 1995
UI - Skripsi (Membership)
Siregar, Robert Agustinus, author
Universitas Indonesia, 1991
UI - Skripsi (Membership)
Universitas Indonesia, 1990
UI - Skripsi (Membership)