APA
Schaefer B., . (2014). Natural products in the chemical industry. New York: Springer.
Chicago
Schaefer Bernd, . 2014. Natural products in the chemical industry. New York: Springer.
Harvard
Schaefer B., . (2014). Natural products in the chemical industry. New York: Springer.
MLA
Schaefer Bernd, . Natural products in the chemical industry. New York: Springer. 2014.