Sheehan, D. (1981). Shut up and sell: Tested techniques for closing the sale / Don Sheehan ; foreword by Norman Vincent Peale. National Book Store.
Cita Chicago Style (17a ed.)Sheehan, Don. Shut Up and Sell: Tested Techniques for Closing the Sale / Don Sheehan ; Foreword by Norman Vincent Peale. [Manila]: National Book Store, 1981.
Cita MLA (9a ed.)Sheehan, Don. Shut Up and Sell: Tested Techniques for Closing the Sale / Don Sheehan ; Foreword by Norman Vincent Peale. National Book Store, 1981.
Precaución: Estas citas no son 100% exactas.