APA
P.N. Campbell, . (1968). Essay In Biochemistry. New York: Academy Press.
Chicago
P.N. Campbell, . 1968. Essay In Biochemistry. New York: Academy Press.
Harvard
P.N. Campbell, . (1968). Essay In Biochemistry. New York: Academy Press.
MLA
P.N. Campbell, . Essay In Biochemistry. New York: Academy Press. 1968.