APA (7th ed.) Citation

Helpenstein, H. J. (1993). CAD Geometry Data Exchange Using STEP: Realisation of Interface Processors. Springer Berlin Heidelberg.

Chicago Style (17th ed.) Citation

Helpenstein, Helmut J. CAD Geometry Data Exchange Using STEP: Realisation of Interface Processors. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993.

MLA (9th ed.) Citation

Helpenstein, Helmut J. CAD Geometry Data Exchange Using STEP: Realisation of Interface Processors. Springer Berlin Heidelberg, 1993.