2631-2786
2631-2786
S2631-27862021000400109
10.35290/rcui.v8n1e.2021.511
Ecuador
Ecuador
Ecuador
00
12
2021
00
12
2021
8
109
120
[
2020
1-19
]
[
2021
23
129-40
]
[
2021
14
3
3
771-86
]
[
2014
Primera
]
[
2018
Primera
]
[
McGrawHill
2014
Sexta Edic
]
[
2020
]
[
2020
42
170
170
1-72
]
[
2021
39
39
103-20
]
[
2020
78
78
1-21
]
[
2020
1
1
1
2-4
]
[
2020
]