The basic rule of all scientific and scholarly work is that you always should use the original source. But if you must refer to a publication that the author you refer to uses in his/her text, this must be evident, both in the textual reference and in the reference list.
If, for example, you have read Marios Miltiadous's text referring to a publication of Albert Bandura, you write:
In the reference list you should state complete bibliographic information for both publications.
Ring 0520 - 22 34 10 eller maila email@example.com
Chatta med en bibliotekarie - vi svarar mellan kl. 10-17 alla helgfria vardagar under vår- och hösttermin.
Phone 0520 - 22 34 10 or e-mail firstname.lastname@example.org
Chat with a librarian - we are avaliable weekdays between 10 -17 o'clock during spring and autumn semester.