Comati, S., Schaller, H., Gesemann, W., & Krauß, R. (2011). Bulgarien-Jahrbuch 2009 / 2010. Peter Lang International Academic Publishers.
Chicagoスタイル(17版)引用形式Comati, Sigrun, Helmut Schaller, Wolfgang Gesemann, , Raiko Krauß. Bulgarien-Jahrbuch 2009 / 2010. Bern: Peter Lang International Academic Publishers, 2011.
MLA(9版)引用形式Comati, Sigrun, et al. Bulgarien-Jahrbuch 2009 / 2010. Peter Lang International Academic Publishers, 2011.
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