Spence, R. (1991). Clipper, programming guide (2nd ed.). B.P.B. publications.
Chicago Edition CitationSpence, Rick. Clipper, Programming Guide. 2nd ed. Delhi: B.P.B. publications, 1991.
MLA Edition CitationSpence, Rick. Clipper, Programming Guide. 2nd ed. B.P.B. publications, 1991.
Warning: These citations may not always be 100% accurate.