APA (7 वां संस्करण) प्रशस्ति पत्र

BROWN L R. (2000). VITAL SIGNS 2000-2001: ENVIRONMENTAL TRENDS THAT ARE SHAPING OUR FUTURE. EARTHSCAN.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

BROWN L R. VITAL SIGNS 2000-2001: ENVIRONMENTAL TRENDS THAT ARE SHAPING OUR FUTURE. LONDON: EARTHSCAN, 2000.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

BROWN L R. VITAL SIGNS 2000-2001: ENVIRONMENTAL TRENDS THAT ARE SHAPING OUR FUTURE. EARTHSCAN, 2000.