APA (7 वां संस्करण) प्रशस्ति पत्र

Pietzcker, A. (2003). United Towers: United Architects. ARCH+.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Pietzcker, Achim. "United Towers: United Architects." ARCH+ 2003.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Pietzcker, Achim. "United Towers: United Architects." ARCH+, 2003.