Institut za gorata (B ulgarska akademi i a na naukite). (2001). Silva Balcanica. Forest Research Institute - Bulgarian Academy of Sciences (FRI-BAS).
Chicagoスタイル(17版)引用形式Institut za gorata (B ulgarska akademi i a na naukite). Silva Balcanica. Sofia, Bulgaria: Forest Research Institute - Bulgarian Academy of Sciences (FRI-BAS), 2001.
MLA(9版)引用形式Institut za gorata (B ulgarska akademi i a na naukite). Silva Balcanica. Forest Research Institute - Bulgarian Academy of Sciences (FRI-BAS), 2001.
警告: この引用は必ずしも正確ではありません.