“…Questionnaire surveys (Rivera-Camino, 2007;Abzari et al, 2013;Chan, 2013;Ko et al, 2013;Richey et al, 2014;Majerova, 2015;Nadanyiova et al, 2015;Singh, Kumar, 2015;Yadav et al, 2016;Papadas et al, 2017) and observations (Ham, Lee, 2011) are used to measure green marketing performance based on information provided by either the companies themselves or customers. Combined data multigathering techniques are also appropriate for the evaluation of performance of green marketing (Fuentes, 2015;Saxena, 2015;Chen, 2016;Duffett et al, 2018). For example, C. Fuentes (2015) has combined interviews, observations, collections, analysis of textual and non-textual artefacts for studying green marketing.…”