Gaya APA
Chemical Principles. (1973).
Philadelphia:
WB Saunders Company.
Gaya Chicago
Chemical Principles.
Ed.3.
Philadelphia:
WB Saunders Company,
1973.
.
Gaya MLA
Chemical Principles.
Ed.3.
Philadelphia:
WB Saunders Company,
1973.
.
Gaya Turabian
Chemical Principles.
Philadelphia:
WB Saunders Company,
1973.
.