Oppermann, H. R. B. (Hendrik Rudolf Beukes), 1955-

Ball, Terence author.

Charles, Grant

Gravetter, Frederick J., author. (uri) http://id.loc.gov/authorities/names/n84044621 (uri) http://viaf.org/viaf/sourceID/LC 84044621 (uri) /resolver/wikidata/lc/n84044621

Ciccarelli, Saundra K.

Mitchell, K. I., compiler.

Deitel, Paul J.

Bullock, Shane, author.

White, R. D. (Robert Douglas), 1956- author.

Bartol, Curt R., 1940- author.

Hibbeler, R. C., author.

South Africa.