APA (7th ed.) Citation

Schaller, H., Schaller, H. e., Comati, S. e., & Krauß, R. e. (2015). Bulgarien-Jahrbuch 2013 (1st, New ed.). PH02.

Chicago Style (17th ed.) Citation

Schaller, Helmut, Helmut editor Schaller, Sigrun editor Comati, and Raiko editor Krauß. Bulgarien-Jahrbuch 2013. 1st, New ed. Frankfurt a.M: PH02, 2015.

MLA (9th ed.) Citation

Schaller, Helmut, et al. Bulgarien-Jahrbuch 2013. 1st, New ed. PH02, 2015.