APA-Zitierstil (7. Ausg.)

Popov, A., Lakov, P., Iliev, E., & Zhecheva, M. (2018). Geography and economics: 9th grade : student's book. Anubis.

Chicago-Zitierstil (17. Ausg.)

Popov, A., P. Lakov, E. Iliev, und M. Zhecheva. Geography and Economics: 9th Grade : Student's Book. Sofija: Anubis, 2018.

MLA-Zitierstil (9. Ausg.)

Popov, A., et al. Geography and Economics: 9th Grade : Student's Book. Anubis, 2018.