Gaya APA
Kon, A., Ching, W, M. (1996).
Preston Advenced vocabulary practice 1 : Audrey Kon .
Jakarta:
Binarupa Aksara.
Gaya MLA
Kon, Audrey., Ching, Wan, Mun..
"Preston Advenced vocabulary practice 1 : Audrey Kon".
Jakarta:
Binarupa Aksara,
1996.
Buku.