I Pledge Allegiance to Helvetica (Typography) — 1980. Édition, PHI-E-000000000372. Philemone, version publique 1, publiée le 2026-10-10. https://philemone.com/editions/PHI-E-000000000372/i-pledge-allegiance-to-helvetica-typography-1980 (consulté le 2026-10-29).