K.K.K. : friend or foe: which?
MLA
Mast, Blaine. K.k.k.: Friend Or Foe: Which?. [Pittsburgh]: [Herbrick & Held Print. Co.], 1924
APA, 7th edition
Mast, B. (1924). K.K.K.: friend or foe: which?. [Pittsburgh]: [Herbrick & Held Print. Co.]
Chicago, 17th edition
Mast, Blaine. K.K.K.: friend or foe: which?. [Pittsburgh]: [Herbrick & Held Print. Co.], 1924