Gaya APA
Winspirs 5.0 users manual: WinSPIRS users guide. (2003).
Amerika:
Ovid Technologies.
Gaya Chicago
Winspirs 5.0 users manual: WinSPIRS users guide.
.
Amerika:
Ovid Technologies,
2003.
Buku.
Gaya MLA
Winspirs 5.0 users manual: WinSPIRS users guide.
.
Amerika:
Ovid Technologies,
2003.
Buku.
Gaya Turabian
Winspirs 5.0 users manual: WinSPIRS users guide.
Amerika:
Ovid Technologies,
2003.
Buku.