Gaya APA
Riyanto, S. (2000).
Toefl test of english as a foreign language preparation (edisi 1 cetakan 20).
yokyakarta:
CV Adi Ofset.
Gaya MLA
Riyanto, Slamet.
"Toefl test of english as a foreign language preparation".
edisi 1 cetakan 20
yokyakarta:
CV Adi Ofset,
2000.
Text.