Gaya APA
Winter, C, B, M, P, &, M.
(1985).
Student practice book 4
(
1)
.
London:
Macmillan.
Gaya MLA
Winter, Christopher, Bury,, Mike, Potter, &, Michael.
"Student practice book 4".
1
London:
Macmillan,
1985.
Buku Analog.