MLA
Beasley, Delilah L. (Delilah Leontium), 1871-1934. The Negro trail blazers of California : a compilation of records from the California archives in the Bancroft Library at the University of California, in Berkeley, and from the diaries, old papers and conversations of old pioneers in the State of California : it is a true record of facts, as they pertain to the history of the pioneer and present day Negroes of California. 1919. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/747dr7st4x-cor.
APA, 6th edition
Beasley, Delilah L. (Delilah Leontium), 1871-1934. (1919)[The Negro trail blazers of California : a compilation of records from the California archives in the Bancroft Library at the University of California, in Berkeley, and from the diaries, old papers and conversations of old pioneers in the State of California : it is a true record of facts, as they pertain to the history of the pioneer and present day Negroes of California]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/747dr7st4x-cor.
Chicago
Beasley, Delilah L. (Delilah Leontium), 1871-1934, The Negro trail blazers of California : a compilation of records from the California archives in the Bancroft Library at the University of California, in Berkeley, and from the diaries, old papers and conversations of old pioneers in the State of California : it is a true record of facts, as they pertain to the history of the pioneer and present day Negroes of California, 1919, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/747dr7st4x-cor.