The possible is irrelevant, so it is only worth trying for the impossible

MLA

Theobald, Robert. The Possible Is Irrelevant, so It Is Only Worth Trying for the Impossible. Jan. 1970. EBSCOhost, https://doi.org/10.7939/r3887r.

APA

Theobald, R. (1970). The possible is irrelevant, so it is only worth trying for the impossible. https://doi.org/10.7939/r3887r

Chicago

Theobald, Robert. 1970. “The Possible Is Irrelevant, so It Is Only Worth Trying for the Impossible,” January. doi:10.7939/r3887r.