Gaya APA
Murphy, R. (t.t).
Essential Grammar In Use: A Self-Study Reference And Practice Book For Elementary Students Of English (2).
S.L.:
Cambridge University Press.
Gaya MLA
Murphy, Raymond.
"Essential Grammar In Use: A Self-Study Reference And Practice Book For Elementary Students Of English".
2
S.L.:
Cambridge University Press,
t.t.
Text.