APA Style
BIOLOGY : AS LEVEL. (2006).
Edinburgh:
Pearson Education Limited.
Chicago Style
BIOLOGY : AS LEVEL.
.
Edinburgh:
Pearson Education Limited,
2006.
Buku.
MLA Style
BIOLOGY : AS LEVEL.
.
Edinburgh:
Pearson Education Limited,
2006.
Buku.
Turabian Style
BIOLOGY : AS LEVEL.
Edinburgh:
Pearson Education Limited,
2006.
Buku.