Gaya APA
Wainwright, G. (1992).
S.T.E.P.S. for success : self-training in essential personal skills .
London:
Mercury Books.
Gaya MLA
Wainwright, Gordon.
"S.T.E.P.S. for success : self-training in essential personal skills".
London:
Mercury Books,
1992.
Buku/Printed Material.