Gaya APA

Purwokerto, I, M. (). English Self Study Centre . Purwokerto: IKIP Muhammadiyah Purwokerto.

Gaya MLA

Purwokerto, IKIP, Muhammadiyah. "English Self Study Centre". Purwokerto: IKIP Muhammadiyah Purwokerto, . TEKS.