Oroschakoff : 1979-1991.

MLA

Oroschakoff : 1979-1991. Sofia: The City Gallery, National Kulturpalast, 1991.

APA

(1991). Oroschakoff : 1979-1991. Sofia: The City Gallery, National Kulturpalast.

Chicago

Oroschakoff: 1979-1991. Sofia: The City Gallery, National Kulturpalast, 1991.