Gaya APA
Haiduk, H, P., Ross, P, W. (1991).
Increasing your Productivity Lotus 1-2-3 Release 2.2 .
USA:
The Free Press of Glencoe.
Gaya MLA
Haiduk, H, Paul., Ross, Paul, W.
"Increasing your Productivity Lotus 1-2-3 Release 2.2".
USA:
The Free Press of Glencoe,
1991.
Text.