Sheehan, D. (1981). Shut up and sell: Tested techniques for closing the sale / Don Sheehan ; foreword by Norman Vincent Peale. National Book Store.
Lua i Stíl Chicago (17ú heag.)Sheehan, Don. Shut Up and Sell: Tested Techniques for Closing the Sale / Don Sheehan ; Foreword by Norman Vincent Peale. [Manila]: National Book Store, 1981.
Lua MLA (9ú heag.)Sheehan, Don. Shut Up and Sell: Tested Techniques for Closing the Sale / Don Sheehan ; Foreword by Norman Vincent Peale. National Book Store, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.