Horney, A.S., author
London : Oxford University Press, 1952
Buku Referensi
Gramedia Pustaka Utama, 2005
Buku Teks
Fowler, H. W. (Henry Watson), 1858-1933, author
New York Oxford University Press 1965
Buku Referensi
Scotland, 1999
Buku Referensi
England Longman 1983
Buku Referensi