APA-referens (7:e uppl.)

Não informado. (2003). Data processing in education. Data Processing in Education.

Chicago-referens (17:e uppl.)

Não informado. Data Processing in Education. Philadelphia, Pa: Data Processing in Education, 2003.

MLA-referens (8:e uppl.)

Não informado. Data Processing in Education. Data Processing in Education, 2003.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.