Holland, William E
Pocket Books, 1992
Buku Teks
Artikel Jurnal
Davies, Joseph Edward
Simon and Schuster, 1941
Buku Teks
Pallasmaa, Juhani, author
Academy Editions, 1996
Buku Teks
Damanik, Difi Sangunan, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1995
UI - Skripsi (Membership)