Gaya APA
Burke, D., Calabria, J. (1997).
Microsoft Office User Specialist: Excel 97 Exam Guide (Pertama).
Indianapolis:
Que.
Gaya MLA
Burke, Dorothy., Calabria, Jane.
"Microsoft Office User Specialist: Excel 97 Exam Guide".
Pertama
Indianapolis:
Que,
1997.
Teks.