Finch, Christopher, author
NY The Monacelli Press, 2013
Buku Referensi
Sage, Martin, author
Amphoto, 1989
Buku Referensi
Kaulya, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Skripsi (Membership)
Syifa Haryanti Khairunnisa, author
Fakultas Psikologi Universitas Indonesia, 2021
UI - Skripsi (Membership)
Mackintosh, A.S.
Cambridge University Press , 1963
Buku Teks