Gaya APA
Ph.D., J, P. et al (2008).
Interlanguage: English for SeniorHigh School Student XI .
Klaten:
Pusat Perbukuan.
Gaya MLA
Ph.D., Joko, Priyana,. et al.
"Interlanguage: English for SeniorHigh School Student XI".
Klaten:
Pusat Perbukuan,
2008.
Text.