Case study strategies include knowledge selection as a result of direct observations, interviews, and analyses of Principal and secondary resources. Defining a source as Key, secondary, or tertiary may also count on the way you are working with the material. A newspaper report might be both Key and secondary. https://harvard-case-study-help81370.wizzardsblog.com/34379298/an-unbiased-view-of-buy-case-study-help