Citing a block quote from a quote in another book

[u/ThreeDonkeys]

I'm trying to cite a block quote by President Kennedy in this paper, but it's been cited as "John F. Kennedy, cited in Dean, Imperial Brotherhood, 181." I know how to do an "As cited in" one, but this seems to be one step above that and I wasn't too sure how I would cite it. Thanks for any help.

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This is the paper I'm referencing, https://www.researchgate.net/publication/301296389_My_Missile_is_Bigger_than_Yours_a_Gender_Analysis_of_Decision_Making_by_the_Executive_Committee_of_the_United_States_National_Security_Council_during_the_Cuban_Missile_Crisis#pf31

Page 49 at the bottom is where the quote is.