Gaya APA
Johan, R. (2001).
Communicative English for Elementary School Students : Book I for first class (Cet. 1).
Jakarta:
Gunung Mulia.
Gaya MLA
Johan, Rita.
"Communicative English for Elementary School Students : Book I for first class".
Cet. 1
Jakarta:
Gunung Mulia,
2001.
Monograf.