URL: iquatroeditores ... http://iquatroeditores.com/revista/index.php/relep/issue/view/9/RELEP%20Septiembre%2C%20Diciembre%202018
URL: iquatroeditores ... http://iquatroeditores.com/revista/index.php/relep/issue/view/9/RELEP%20Septiembre%2C%20Diciembre%202018
Google: www.google.com/ ... https://www.google.com/search?q=ISSN+%222594-2913%22
Bing: www.bing.com/se ... https://www.bing.com/search?q=ISSN+%222594-2913%22
Yahoo: search.yahoo.co ... https://search.yahoo.com/search?p=ISSN%20%222594-2913%22
CROSSREF: search.crossref ... https://search.crossref.org/?q=+2594-2913