Penggayaan APA
Hartley, Peter. (1997).
Group communication .
London:
Routlatge.
Chicago Style
Hartley, Peter.
Group communication.
London:
Routlatge,
1997.
Buku.
MLA Style
Hartley, Peter.
Group communication.
London:
Routlatge,
1997.
Buku.
Turabian Style
Hartley, Peter.
Group communication.
London:
Routlatge,
1997.
Buku.