Guffey, M. E. (1998). Professional writer's electronic resource: Version 1.0 (version 1.0.). Cincinnati, OH: South-Western College.
استشهاد بنمط شيكاغوGuffey, Mary Ellen. Professional Writer's Electronic Resource: Version 1.0. version 1.0. Cincinnati, OH: South-Western College, 1998.
MLA استشهادGuffey, Mary Ellen. Professional Writer's Electronic Resource: Version 1.0. version 1.0. Cincinnati, OH: South-Western College, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.