Brouwer, Martinus Antonius Wesselinus, 1923-
Gramedia, 1985
Buku Teks SO
Herdiana Hakim
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2004
UI - Skripsi Membership
Staudt, Thomas A.
Prentice-Hall, 1965
Buku Teks SO
Staudt, Thomas A.
Prentice-Hall, 1970
Buku Teks SO
Lehmann, John
Thames & Hudson, 1987
Buku Teks SO