Gaya APA
Practical Research : Planing and Design. (1980).
London:
Memillan.
Gaya Chicago
Practical Research : Planing and Design.
2.
London:
Memillan,
1980.
Buku.
Gaya MLA
Practical Research : Planing and Design.
2.
London:
Memillan,
1980.
Buku.
Gaya Turabian
Practical Research : Planing and Design.
London:
Memillan,
1980.
Buku.