Clark, Sydney
All the best in South America East Coast Venezuela, Surinam, Brazil, Paraguay, Uruguay, Argentina With illustrations and maps
Dodd, Mead, 1966
Buku Teks SO
The best american essays 2000
edited by Alan Lightman
Houghtn Mifflin, 2000
Buku Teks
Pllard, Velma
Homestretch
London Longman 1994
Buku Teks
Slayden, Ellen Maury
Washington wife: journal of Ellen Maury Slayden from 1897 - 1919
New York: Harper & Row Publishers, [c1963]
Buku Teks
Annal of the Association of American Geographer
Nendeln : The Association of American Geographers
Majalah, Jurnal, Buletin