Higgie, J. (1999). Primary Colours: Jennifer Hifggie on Karl Gerstner. frieze.
Cita Chicago (17th ed.)Higgie, Jennifer. "Primary Colours: Jennifer Hifggie on Karl Gerstner." Frieze 1999.
Cita MLA (8th ed.)Higgie, Jennifer. "Primary Colours: Jennifer Hifggie on Karl Gerstner." Frieze, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.