Franklin, Benjamin
The Spencer Press, 1936
Buku Teks
Maugham, W. Somerset, author
Fawcett, 1956
Koleksi Publik
Blundell, Nigel, author
Octopus Books Limited, 1980
Buku Teks
Oscar Leonard Josua Mangaraja Manaloe, author
Sekolah Ilmu Lingkungan Universitas Indonesia, 2020
UI - Tesis (Membership)
McGraw-Hill, [date of publication not identified]
Buku Teks