Yeo, Robert
Kuala Lumpur; Hongkong heinemann Asia, 1985
Buku Teks
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1969
UI - Skripsi (Membership)
London JM Dent & Sons [1945]
Buku Teks
edited by Satyagraha Hoerip
Executive Committee, Festival of Indonesia, 1990
Buku Teks
Oxford University Press, 1954
Buku Teks