APA Style
Usman, R.
(1995).
Instrumen Penelitian Bidang Sosial
.
Yogyakarta:
Gadjah Mada University Press.
MLA Style
Usman, Rachmad.
"Instrumen Penelitian Bidang Sosial".
Yogyakarta:
Gadjah Mada University Press,
1995.
Buku PGSD.