Hackett, Brian
Percival Marshal, 1950.
Buku Teks
Luqman Dinoer Abiyasa
Fakultas Teknik Universitas Indonesia, 2013
UI - Skripsi (Membership)
Hall, Peter
Routledge, 1992
Buku Teks
Hall, Peter
Routledge, 2011
Buku Teks
Friend, J.K.
Tavistock Publications, 1974
Buku Teks