APA (7th ed.) Citation

(1990). Norbert Blüm. Econ-Verl.

Chicago Style (17th ed.) Citation

Norbert Blüm. Düsseldorf ; Wien ; New York: Econ-Verl, 1990.

MLA (9th ed.) Citation

Norbert Blüm. Econ-Verl, 1990.

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