APA:
Shurulinkov, Peter, Stoyanov, George (2006). Some new findings pigmy owl Glaucidium passerinum and tengmalm's owl Aegolius funereus in western and southern Bulgaria.
Acrocephalus, letnik 27, številka 128/129, str. 65-68.
URN:NBN:SI:doc-30UC523E from http://www.dlib.si
MLA:
Shurulinkov, Peter, Stoyanov, George. "Some new findings pigmy owl Glaucidium passerinum and tengmalm's owl Aegolius funereus in western and southern Bulgaria."
Acrocephalus letnik 27. številka 128/129 (2006) str. 65-68.
<http://www.dlib.si/?URN=URN:NBN:SI:doc-30UC523E>