Scott, G. G. (1992). Sucess in multi-level marketing. Prentice Hall.
Cita Chicago Style (17a ed.)Scott, Gini Graham. Sucess in Multi-level Marketing. Paramus [N.J.]: Prentice Hall, 1992.
Cita MLA (9a ed.)Scott, Gini Graham. Sucess in Multi-level Marketing. Prentice Hall, 1992.
Precaución: Estas citas no son 100% exactas.