Gaya APA
M.J., L., Sumitri, (1992).
Fundamentals of English grammar for intermediate students / M.J. Lado, Sumitri .
Jakarta:
.
Gaya MLA
Lado, M.J.., Sumitri, .
"Fundamentals of English grammar for intermediate students / M.J. Lado, Sumitri".
Jakarta:
,
1992.
Textbook.