Cita APA

Passens, B., & Scholl, I. (1991). Wordperfect: Version 6.0. Prisma computer course.

Citación estilo Chicago

Passens, Bernd, y Ingrid Scholl. Wordperfect: Version 6.0. London: Prisma computer course, 1991.

Cita MLA

Passens, Bernd, y Ingrid Scholl. Wordperfect: Version 6.0. Prisma computer course, 1991.