Gaya APA
Pure. (2012).
New York:
Grand Central Publishing.
Gaya Chicago
Pure.
.
New York:
Grand Central Publishing,
2012.
Buku.
Gaya MLA
Pure.
.
New York:
Grand Central Publishing,
2012.
Buku.
Gaya Turabian
Pure.
New York:
Grand Central Publishing,
2012.
Buku.