Wekerle, G. R. (1998). Safe Cities Guidelines For Planning, Design And Management Gerda R. Wekerle, Carolyn Whitzman. Van Nostrand Reinhold.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWekerle, Gerda R. Safe Cities Guidelines For Planning, Design And Management Gerda R. Wekerle, Carolyn Whitzman. Van Nostrand Reinhold, 1998.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWekerle, Gerda R. Safe Cities Guidelines For Planning, Design And Management Gerda R. Wekerle, Carolyn Whitzman. Van Nostrand Reinhold, 1998.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.