| Ubels, Edward H. and Virginia Ubels | Phonology of Karang | 1980 | | Linguistics |
| Ubels, Edward H.; Yapélé, Jean-Pierre | Mbete túku 1, 2 | 1984 | | |
| Ubels, Edward H | Rapport annuel/Annual report 1987-1988 | 1988 | | Communications |
| Ubels, Edward H | Rapport annuel/Annual report 1986-87 | 1987 | | Communications |
| Ubels, Edward H.; Ubels, Virginia; Yapélé, Jean-Pierre | Lisons et écrivons la langue karang | 1982 | | |
| Ubels, Edward H.; Ubels, Virginia; Yapélé, Jean-Pierre | Jaŋgen e mbinden wolde karaŋ | 1982 | | |
| Ubels, Edward H., compiler | SIL Cameroon annual report 1988-1989 (SIL Cameroun rapport annuel 1988-1989) | 1989 | | Communications |
| Ubels, Edward H., compiler | Cameroun, rapport annuel/Cameroon, annual report 1989-1990 | 1990 | | Communications |
