Martel, John S.
Bantam Books, 1988
Buku Teks
Christie, Agatha, 1890-1976, author
Gramedia Pustaka Utama, 2018
Buku Teks
Industrial Publishers B.V. , 1995
Buku Teks
Weber, Ralf.
Avebury, 1995
Buku Teks
Isard, Walter, author
John Wiley & Sons, 1956
Buku Teks