Gaya APA
Ober, S. et al
(2002).
College keyboarding & document processing : lesson 1-60
.
Amerika:
Mc Graw - Hill.
Gaya MLA
Ober, Scot. et al.
"College keyboarding & document processing : lesson 1-60".
Amerika:
Mc Graw - Hill,
2002.
Text.