Cita APA (7th ed.)
Pedersen, B. M., & Boyd, C. Graphis Photography Annual 2021. Graphis.
Cita Chicago (17th ed.)
Pedersen, B. Martin, i Colleen Boyd. Graphis Photography Annual 2021. Nueva York, EUA: Graphis.
Cita MLA (9th ed.)
Pedersen, B. Martin, i Colleen Boyd. Graphis Photography Annual 2021. Graphis.
Atenció: Aquestes cites poden no estar 100% correctes.