Gaya APA
Hartley, Peter. (1997).
Group communication .
Routledge:
London.
Gaya Chicago
Hartley, Peter.
Group communication.
Routledge:
London,
1997.
Text.
Gaya MLA
Hartley, Peter.
Group communication.
Routledge:
London,
1997.
Text.
Gaya Turabian
Hartley, Peter.
Group communication.
Routledge:
London,
1997.
Print.