APA
Wheeler J. H., Wheeler J. H., . (1990). World regional geography. Philadelphia: Saunders college publishing.
Chicago
Wheeler Jesse H, Wheeler Jesse H, . 1990. World regional geography. Philadelphia: Saunders college publishing.
Harvard
Wheeler J. H., Wheeler J. H., . (1990). World regional geography. Philadelphia: Saunders college publishing.
MLA
Wheeler Jesse H, Wheeler Jesse H, . World regional geography. Philadelphia: Saunders college publishing. 1990.