APA
Friedhelm, . (1975). Methodicum Chimicum. V 6. C-N Compounds. New York: Academic.
Chicago
Friedhelm, . 1975. Methodicum Chimicum. V 6. C-N Compounds. New York: Academic.
Harvard
Friedhelm, . (1975). Methodicum Chimicum. V 6. C-N Compounds. New York: Academic.
MLA
Friedhelm, . Methodicum Chimicum. V 6. C-N Compounds. New York: Academic. 1975.