Ryck, M. M. d. (1982). [Zaire colonial documents: De Ryck collection of material on general administration, Equateur, Kivu, and Ruanda-Urundi, ca. 1885-1954. Center for Research Libraries.
Lua i Stíl Chicago (17ú heag.)Ryck, Maurice Martin de. [Zaire Colonial Documents: De Ryck Collection of Material on General Administration, Equateur, Kivu, and Ruanda-Urundi, Ca. 1885-1954. Chicago, Ill.: Center for Research Libraries, 1982.
Lua MLA (8ú heag.)Ryck, Maurice Martin de. [Zaire Colonial Documents: De Ryck Collection of Material on General Administration, Equateur, Kivu, and Ruanda-Urundi, Ca. 1885-1954. Center for Research Libraries, 1982.
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