Gaya APA
Anggawirya, E.
(1994).
Wordstar professional version 7.0 : Erhans Anggawirya
.
Surabaya:
Indah.
Gaya MLA
Anggawirya, Erhans.
"Wordstar professional version 7.0 : Erhans Anggawirya".
Surabaya:
Indah,
1994.
Buku.