Cita APA (7th ed.)

Esche, P. G., Fiedler, H., & Uttikal, D. (1975). Carl Zeiss Jena: Fortschritt Technik Tradition. Carl Zeiss Jena.

Cita Chicago (17th ed.)

Esche, Paul Gerhard, Horst Fiedler, i Detlef Uttikal. Carl Zeiss Jena: Fortschritt Technik Tradition. Jena: Carl Zeiss Jena, 1975.

Cita MLA (8th ed.)

Esche, Paul Gerhard, et al. Carl Zeiss Jena: Fortschritt Technik Tradition. Carl Zeiss Jena, 1975.