bt Peter Banister ... [and others]
Open University Press, 2006
Buku Teks
Enos, Matthew, author
Wadsworth, 2002
Buku Teks
Fakultas Teknik Universitas Indonesia, 1993
UI - Skripsi (Membership)
J. B. Sumarlin, author
UI-Press, 2016
UI - Pidato
Ariq Rahadianto, author
Fakultas Psikologi Universitas Indonesia, 2022
UI - Skripsi (Membership)