Cita APA (7th ed.)

(1988). Dietz-Geschichtskalender 1988 (o.A.). Dietz.

Cita Chicago (17th ed.)

Dietz-Geschichtskalender 1988. o.A. Berlin: Dietz, 1988.

Cita MLA (8th ed.)

Dietz-Geschichtskalender 1988. o.A. Dietz, 1988.