Arden, P. (2007). Whatever you think the think opposite. Jakarta: Esensi.
Chicago Style aipamenaArden, Paul. Whatever You Think the Think Opposite. Jakarta: Esensi, 2007.
MLA aipamenaArden, Paul. Whatever You Think the Think Opposite. Jakarta: Esensi, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.