APA Style
Duffy, Tim. (1989).
Four software tools plus applications and concepts .
California:
Wadsworth publishing Comnpany.
Chicago Style
Duffy, Tim.
Four software tools plus applications and concepts.
California:
Wadsworth publishing Comnpany,
1989.
Buku Teks.
MLA Style
Duffy, Tim.
Four software tools plus applications and concepts.
California:
Wadsworth publishing Comnpany,
1989.
Buku Teks.
Turabian Style
Duffy, Tim.
Four software tools plus applications and concepts.
California:
Wadsworth publishing Comnpany,
1989.
Buku Teks.