Christie, Agatha, 1890-1976, author
Gramedia Pustaka Utama, 2013
Buku Teks
Carrel, Alexis, author
Penguin Books, 1967
Buku Teks
Natia Humairah, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2020
UI - Tesis (Membership)
Ireland, David, author
Angus and Roberson Publishers, 1983
Buku Teks
Ireland, David, author
Angus and Robertson, 1971
Buku Teks