Sykes, Egerton, author
London, J.M. Dent and Sons
Buku Referensi
LaMeres, Brock J., author
Springer Nature, 2019
eBooks
LaMeres, Brock J., author
Springer Nature, 2019
eBooks
Richards, Tom, author
Addison-Wesley Pub. Co., 1989
Buku Teks
Foster, Gerard N., author
Macmillan, 1994
Buku Teks