APA-čujuhus (7. p.)
Gregg, R. B., & forewad by Martin Luther King Jr. (1959). The power of nonviolence. Fellowship publications.
Chicago-čujuhus (17. p.)
Gregg, Richard B., juo forewad by Martin Luther King Jr. The Power of Nonviolence. New York: Fellowship publications, 1959.
MLA-čujuhus (9. p.)
Gregg, Richard B., juo forewad by Martin Luther King Jr. The Power of Nonviolence. Fellowship publications, 1959.
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