Gaya APA
Psychology in progress. (1983).
London:
Methuen & Co,LTD.
Gaya Chicago
Psychology in progress.
~.
London:
Methuen & Co,LTD,
1983.
Buku.
Gaya MLA
Psychology in progress.
~.
London:
Methuen & Co,LTD,
1983.
Buku.
Gaya Turabian
Psychology in progress.
London:
Methuen & Co,LTD,
1983.
Buku.