Gaya APA

Heng, H H. (dkk.). (2007). Chemistry : As Level and A Level (2007) . Cambridge, Australia: Cambridge University Press.

Gaya Chicago

Heng, H H. (dkk.). Chemistry : As Level and A Level (2007). Cambridge, Australia: Cambridge University Press, 2007. Printed Book.

Gaya MLA

Heng, H H. (dkk.). Chemistry : As Level and A Level (2007). Cambridge, Australia: Cambridge University Press, 2007. Printed Book.

Gaya Turabian

Heng, H H. (dkk.). Chemistry : As Level and A Level (2007). Cambridge, Australia: Cambridge University Press, 2007. Printed Book.