Gaya APA
Silaen, S., Heriyanto, Y.
(2014).
Pengantar statistika sosial
.
Bogor:
IN MEDIA.
Gaya MLA
Silaen, Safar., Heriyanto, Yayak.
"Pengantar statistika sosial".
Bogor:
IN MEDIA,
2014.
Textbook.