Spark, Muriel
Constable, 1992
Buku Teks
Austen, Jane, author
A Wilco Book, 2010
Buku Teks
Davies, Hugh Sykes
Published for the British Council by Longmans, Green, 1960
Buku Teks
Destri Wirani, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2020
UI - Skripsi (Membership)
Johnson, Edgar, author
Simon and Schuster, 1952
Buku Teks