Gaya APA
Spielberger, Charles. (1979).
Understanding stress and anxiety .
London:
Harper and Row.
Gaya Chicago
Spielberger, Charles.
Understanding stress and anxiety.
London:
Harper and Row,
1979.
Text.
Gaya MLA
Spielberger, Charles.
Understanding stress and anxiety.
London:
Harper and Row,
1979.
Text.
Gaya Turabian
Spielberger, Charles.
Understanding stress and anxiety.
London:
Harper and Row,
1979.
Print.