Beckley, J. H., Paredes, M. D., & Lopetcharat, K. (2012). Product innovation toolbox: A field guide to consumer understanding and research. Wiley-Blackwell.
Lua i Stíl Chicago (17ú heag.)Beckley, Jacqueline H., Maria Dulce Paredes, agus Kannapon Lopetcharat. Product Innovation Toolbox: A Field Guide to Consumer Understanding and Research. Hoboken, N.J: Wiley-Blackwell, 2012.
Lua MLA (9ú heag.)Beckley, Jacqueline H., et al. Product Innovation Toolbox: A Field Guide to Consumer Understanding and Research. Wiley-Blackwell, 2012.
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