Cita APA (7th ed.)

Heynen, J., & Szymczyk, A. (2009). Wilhelm Sasnal. Prestel.

Cita Chicago (17th ed.)

Heynen, Julian, i Adam Szymczyk. Wilhelm Sasnal. München [u.a.]: Prestel, 2009.

Cita MLA (8th ed.)

Heynen, Julian, i Adam Szymczyk. Wilhelm Sasnal. Prestel, 2009.