Gaya APA
usman, S, &, E.
(1977).
Modern language testing
(
2nd ed.)
.
San Diego:
harcourt brace jovanovich.
Gaya MLA
usman, Sumbodo, &, Eni.
"Modern language testing".
2nd ed.
San Diego:
harcourt brace jovanovich,
1977.
Text.