Gaya APA
English in Focus for Grade IX junior High School (SMP/MTs) BSE. (2008).
Jakarta:
Pusat Perbukuan Departemen Pendidikan Nasional.
Gaya Chicago
English in Focus for Grade IX junior High School (SMP/MTs) BSE.
Ed-1.
Jakarta:
Pusat Perbukuan Departemen Pendidikan Nasional,
2008.
Text.
Gaya MLA
English in Focus for Grade IX junior High School (SMP/MTs) BSE.
Ed-1.
Jakarta:
Pusat Perbukuan Departemen Pendidikan Nasional,
2008.
Text.
Gaya Turabian
English in Focus for Grade IX junior High School (SMP/MTs) BSE.
Jakarta:
Pusat Perbukuan Departemen Pendidikan Nasional,
2008.
Print.