Gaya APA

Riyanto, Slamet. (). TOEIC . : .

Gaya Chicago

Riyanto, Slamet. TOEIC. : , . Text.

Gaya MLA

Riyanto, Slamet. TOEIC. : , . Text.

Gaya Turabian

Riyanto, Slamet. TOEIC. : , . Print.