Gaya APA
Burton, D, J, &, R, J, I. (1974).
Essential of Organic and Biochemical .
Philadelphia:
W.B Saunders Company.
Gaya MLA
Burton, Donald, J., &, Routh,, Joseph, I.
"Essential of Organic and Biochemical".
Philadelphia:
W.B Saunders Company,
1974.
Text.