Citazione APA

Guffey, M. E. (1998). Professional writer's electronic resource. Version 1.0. Disk 3-4 (version 1.0.). Cincinnati, OH: South-Western College.

Stile di citazione Chicago

Guffey, Mary Ellen. Professional Writer's Electronic Resource. Version 1.0. Disk 3-4. version 1.0. Cincinnati, OH: South-Western College, 1998.

Citazione MLA

Guffey, Mary Ellen. Professional Writer's Electronic Resource. Version 1.0. Disk 3-4. version 1.0. Cincinnati, OH: South-Western College, 1998.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.