Vining, Elizabeth Gray
Lippincott , 1960
Buku Teks
Grisham, John, author
Random House Audio, 2014
Buku Teks
Hanna Frisca Chesyta Zihni, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi (Membership)
Neale, J. E., author
Alden Press, 1950
Buku Referensi
Brooke, Jocelyn, author
Longman, 1952
Buku Teks