Answer:
name, credentials
Step-by-step explanation:
Quotations are very important for the text that Kowalski presents. This is because the citations enrich the text and leave the content with an air of greater relevance, since it has the support of several professionals who understand and who has the property to talk about the subject that Kowalski is presented. To reinforce this, Kowalski makes references to the quotes showing the name and credentials of the person who created them.