Gaya APA

Chemistry. ([s.a]). [s.l]: Allyn And Bacon.

Gaya Chicago

Chemistry. . [s.l]: Allyn And Bacon, [s.a]. .

Gaya MLA

Chemistry. . [s.l]: Allyn And Bacon, [s.a]. .

Gaya Turabian

Chemistry. [s.l]: Allyn And Bacon, [s.a]. .