Cho, P. Y. (1979). The fourth dimension (ed.). Rhema publication ministry.
Lua i Stíl Chicago (17ú heag.)Cho, Paul Yonggi. The Fourth Dimension. ed. Rhema publication ministry, 1979.
Lua MLA (9ú heag.)Cho, Paul Yonggi. The Fourth Dimension. ed. Rhema publication ministry, 1979.
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