(1983). Marketing digest. s.n.].
Lua i Stíl Chicago (17ú heag.)Marketing Digest. [s.l: s.n.], 1983.
Lua MLA (9ú heag.)Marketing Digest. s.n.], 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
(1983). Marketing digest. s.n.].
Lua i Stíl Chicago (17ú heag.)Marketing Digest. [s.l: s.n.], 1983.
Lua MLA (9ú heag.)Marketing Digest. s.n.], 1983.