Gaya APA
Wishon, G, E., Burks, J, M.
(1980).
Let's Write English Revised Edition
(
Ed. 1)
.
U.S.A:
LEP.
Gaya MLA
Wishon, George, E., Burks, Julia, M.
"Let's Write English Revised Edition".
Ed. 1
U.S.A:
LEP,
1980.
Teknik Sipil.