Croy was a good friend of the author Dale Carnegie and Carnegie's 1936 book How to Win Friends and Influence People is dedicated to him.
kɹˈɔɪ wʌzɐ ɡˈʊd fɹˈɛnd ʌvðɪ ˈɔːθɚ dˈeɪl kˈɑːɹnəɡi ænd kˈɑːɹnəɡiz nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi sˈɪks bˈʊk hˌaʊ tə wˈɪn fɹˈɛndz ænd ˈɪnfluːəns pˈiːpəl ɪz dˈɛdᵻkˌeɪɾᵻd tə hˌɪm.