Library of Congress. Classification Division & Perley, C. W. (1927). Classification: Class B, part II, BL-BX: Religion. Printed as manuscript. U.S. Govt. print. off..
Citace podle Chicago (17th ed.)Library of Congress. Classification Division a Clarence Warner Perley. Classification: Class B, Part II, BL-BX: Religion. Printed as Manuscript. Washington: U.S. Govt. print. off., 1927.
Citace podle MLA (8th ed.)Library of Congress. Classification Division a Clarence Warner Perley. Classification: Class B, Part II, BL-BX: Religion. Printed as Manuscript. U.S. Govt. print. off., 1927.
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