APA-referens (7:e uppl.)
Mayda, C. (2013). A regional geography of the United States and Canada: Toward a sustainable future. Rowman & Littlefield Publishers.
Chicago-referens (17:e uppl.)
Mayda, Chris. A Regional Geography of the United States and Canada: Toward a Sustainable Future. Lanham, MD: Rowman & Littlefield Publishers, 2013.
MLA-referens (9:e uppl.)
Mayda, Chris. A Regional Geography of the United States and Canada: Toward a Sustainable Future. Rowman & Littlefield Publishers, 2013.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.