Gaya APA
Wishon, G., E., Burks, J., M. (1980).
Let's Write English (Revisi).
New York:
Litton Educational Publishing International.
Gaya MLA
Wishon, George, E.., Burks, Julia, M..
"Let's Write English".
Revisi
New York:
Litton Educational Publishing International,
1980.
Buku Inti.