Timmermans, Felix, 1886-1947, author
Davidsfonds, 1991
Buku Teks
Timmermans, Felix, 1886-1947, author
De Muiderking, [Date of publication not identified]
Buku Teks
Kristina Utari Djaro, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2004
UI - Skripsi (Membership)
Morrien, Adriaan
De Arbeiderspers, 1988
Buku Teks
Huizinga, Leonhard, author
Querido, 1971
Buku Teks