Cita APA (7a ed.)

Hobbs, L., & England, K. (1991). Rdb-VMS: A comprehensive guide. Digital Press.

Cita Chicago Style (17a ed.)

Hobbs, Lilian, y Ken England. Rdb-VMS: A Comprehensive Guide. Bedford, Massachusetts: Digital Press, 1991.

Cita MLA (9a ed.)

Hobbs, Lilian, y Ken England. Rdb-VMS: A Comprehensive Guide. Digital Press, 1991.