Müller, K. B. (2003). Anja Billing: Flow. Billing.
Cita Chicago (17th ed.)Müller, Katrin Bettina. Anja Billing: Flow. Berlin: Billing, 2003.
Cita MLA (8th ed.)Müller, Katrin Bettina. Anja Billing: Flow. Billing, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.