APA Format
Pasaribu, G.B.. (1975).
Auther approach to good English / G.B. Pasaribu ... [et. al]
. Jakarta :: Mutiara,.
MLA Format
Pasaribu, G.B..
Auther approach to good English / G.B. Pasaribu ... [et. al]
. Jakarta :: Mutiara,, 1975
Chicago Format
Pasaribu, G.B.. Auther approach to good English / G.B. Pasaribu ... [et. al]. Jakarta :: Mutiara,, 1975.