APA-ийн эшлэл(7 дахь хэвлэлт)

Jefferson, M., Pinckney, J., & Skinner, E. P. (1974). Roots of time: A portrait of African life and culture ([1st ed.].). Zenith Books.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Jefferson, Margo, Jerry Pinckney, ба Elliott Percival Skinner. Roots of Time: A Portrait of African Life and Culture. [1st ed.]. Garden City, N.Y.: Zenith Books, 1974.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Jefferson, Margo, et al. Roots of Time: A Portrait of African Life and Culture. [1st ed.]. Zenith Books, 1974.