APA Style
Spenceley, A., janine, .
(2004).
Problem Solvers: Why Be Unfriendly?
.
Yogyakarta:
Penerbit kanisius.
MLA Style
Spenceley, Annabel., janine, .
"Problem Solvers: Why Be Unfriendly?".
Yogyakarta:
Penerbit kanisius,
2004.
Text.