एपीए उद्धरण

Getis, A. (2004). Introduction to geography. Boston, MA: McGraw-Hill.

शिकागो स्टाइल उद्धरण

Getis, Arthus. Introduction to Geography. Boston, MA: McGraw-Hill, 2004.

एमएलए उद्धरण

Getis, Arthus. Introduction to Geography. Boston, MA: McGraw-Hill, 2004.