Gerson, R. F. (1991). Writing and implementing a marketing plan: A guide for small business owners. Crisp.
Lua i Stíl Chicago (17ú heag.)Gerson, Richard F. Writing and Implementing a Marketing Plan: A Guide for Small Business Owners. Los Altos, Calif.: Crisp, 1991.
Lua MLA (9ú heag.)Gerson, Richard F. Writing and Implementing a Marketing Plan: A Guide for Small Business Owners. Crisp, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.