Gaya APA
Elementary social studies: a practical guide. (1991).
New York:
Longman.
Gaya Chicago
Elementary social studies: a practical guide.
.
New York:
Longman,
1991.
Buku.
Gaya MLA
Elementary social studies: a practical guide.
.
New York:
Longman,
1991.
Buku.
Gaya Turabian
Elementary social studies: a practical guide.
New York:
Longman,
1991.
Buku.