APA:
Singer, William M. (1994). Geography of opportunity & the whirling gyre: an american urban dilemma. A personal view.
Teorija in praksa, volume 31, issue 1/2, str. 136-144.
URN:NBN:SI:DOC-9TBFFA7M from http://www.dlib.si
MLA:
Singer, William M.. "Geography of opportunity & the whirling gyre: an american urban dilemma. A personal view."
Teorija in praksa volume 31. issue 1/2 (1994) str. 136-144.
<http://www.dlib.si/?URN=URN:NBN:SI:DOC-9TBFFA7M>