Yasman, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1999
UI - Laporan Penelitian
Parker, Steve
Miles Kelly, 2000
Buku Referensi
edited by Timothy E. Ford
Blackwell, 1993
Buku Teks
edited by R.S.K. Barnes and K.H. Mann
Blackwell, 1991
Buku Teks
Williams, Venus, author
Amistad, 2010
Buku Teks