Gaya APA
Surapranata, S.
(2006).
Penilaian portofolio
.
Bandung:
Remaja rosdakarya.
Gaya MLA
Surapranata, Sumarna.
"Penilaian portofolio".
Bandung:
Remaja rosdakarya,
2006.
Printed Book.