Mentor Book, 1951
Buku Teks
Harris, Maxwell Henley, author
National Library of Australia, 1996
Buku Teks
Hart, Kevin, author
Angus & Robertson, 1981
Koleksi Publik
Perrine, Laurence, author
Harcourt, Brace College, 1992
Buku Teks
Arp, Thomas R., author
Thomson/Wadsworth, 2005
Buku Teks