APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.