APA-čujuhus (7. p.)
Langford, D. G. A church educational ministry by cassette for oral leaners in Northeast Zaire. Denver Conservative Baptist Seminary.
Chicago-čujuhus (17. p.)
Langford, David G. A Church Educational Ministry by Cassette for Oral Leaners in Northeast Zaire. Colorado: Denver Conservative Baptist Seminary.
MLA-čujuhus (9. p.)
Langford, David G. A Church Educational Ministry by Cassette for Oral Leaners in Northeast Zaire. Denver Conservative Baptist Seminary.
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