एपीए उद्धरण

 Hopper, L. J. (2005).  Security and site design: A landscape architectural approach to analysis, assessment, and design implementation.  John Wiley & Sons.

शिकागो स्टाइल उद्धरण

 Hopper, Leonard J.  Security and Site Design: A Landscape Architectural Approach to Analysis, Assessment, and Design Implementation.  John Wiley & Sons, 2005.

एमएलए उद्धरण

 Hopper, Leonard J.  Security and Site Design: A Landscape Architectural Approach to Analysis, Assessment, and Design Implementation.  John Wiley & Sons, 2005.