Wenley, A.G., author
Smithsonian Institution, 1944
Buku Teks
Rocha, Luis Miguel, author
Gramedia Pustaka Utama, 2011
Buku Teks
Cross, Donna Woolfolk, author
Serambi Ilmu Semesta, 2007
Buku Teks
Hevi, Immanuel John
Frederick A. Praeger, 1963
Buku Teks
Baines, Paul, 1961-, author
Routledge, 2000
Buku Teks