APA (7th ed.) Citation

(1990). Fortschritt '90. SP Verlag Norbert Schürer.

Chicago Style (17th ed.) Citation

Fortschritt '90. SP Verlag Norbert Schürer, 1990.

MLA (8th ed.) Citation

Fortschritt '90. SP Verlag Norbert Schürer, 1990.

Warning: These citations may not always be 100% accurate.