Gumpert, D. E. (1994). How to really create a successful business plan: Step-by-step guide (2d ed.).
Lua i Stíl Chicago (17ú heag.)Gumpert, David E. How to Really Create a Successful Business Plan: Step-by-step Guide. 2d ed. Goldhirsh Group, Inc, 1994.
Lua MLA (9ú heag.)Gumpert, David E. How to Really Create a Successful Business Plan: Step-by-step Guide. 2d ed. 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.