APA (7th ed.) Citation

Naumov, W., Kardaschenko, N., & Karin, L. (1990). Zeit schwieriger Fragen (o.A.). APN-Verlag.

Chicago Style (17th ed.) Citation

Naumov, Wladimir, Natalia Kardaschenko, and Leonid Karin. Zeit Schwieriger Fragen. o.A. Moskau: APN-Verlag, 1990.

MLA (8th ed.) Citation

Naumov, Wladimir, et al. Zeit Schwieriger Fragen. o.A. APN-Verlag, 1990.

Warning: These citations may not always be 100% accurate.