Borbor Borbor, D. J. (2018). Digital book of basic conversations to improve the speaking skills in students of tenth grade at Unidad Educativa Prof. Cleofé Apolinario Orrala. Rio Verde, Santa Elena, province of Santa Elena. school year 2017-2018.
Chicago-čujuhus (17. p.)Borbor Borbor, Danny Javier. Digital Book of Basic Conversations to Improve the Speaking Skills in Students of Tenth Grade at Unidad Educativa Prof. Cleofé Apolinario Orrala. Rio Verde, Santa Elena, Province of Santa Elena. School Year 2017-2018. 2018.
MLA-čujuhus (9. p.)Borbor Borbor, Danny Javier. Digital Book of Basic Conversations to Improve the Speaking Skills in Students of Tenth Grade at Unidad Educativa Prof. Cleofé Apolinario Orrala. Rio Verde, Santa Elena, Province of Santa Elena. School Year 2017-2018. 2018.