Gaya APA

Riyanto,Slamet, . (2002). The easy way to master english in a few days (Cet.I). : Pustaka Pelajar.

Gaya MLA

Riyanto,Slamet, . "The easy way to master english in a few days". Cet.I : Pustaka Pelajar, 2002. Referensi.