Gaya APA
Trudy, G, ,.
(2010).
A pratical study of argument .
(
7th ed)
.
Newyork:
wadsworth , cengagelearing.
Gaya MLA
Trudy, Govier, ,.
"A pratical study of argument .".
7th ed
Newyork:
wadsworth , cengagelearing,
2010.
Buku.