Ingamells, Rex
Longmans , 1960
Buku Teks
edited by Anne Booth, Chris Manning, Thee Kian Wie
Yayasan Pustaka Obor Indonesia, 2012
Buku Teks
Goodnow, Henry Frank
Yale University Press 1, 1964
Buku Teks
[publisher not identified], 1977
Buku Teks
Hansen, Harry, author
A Mentor Book, 1961
Buku Teks