COBURN, F. D. I., & McCORMICK, P. (1999). The official guide coreldraw 9. Osborne McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)COBURN, Foster D III, agus Pete McCORMICK. The Official Guide Coreldraw 9. New York: Osborne McGraw-Hill, 1999.
Lua MLA (9ú heag.)COBURN, Foster D III, agus Pete McCORMICK. The Official Guide Coreldraw 9. Osborne McGraw-Hill, 1999.
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