APA (7th ed.) Citation

Koenen, E. (1970). Die Grippepandemie 1918/19.

Chicago Style (17th ed.) Citation

Koenen, Eckhard. Die Grippepandemie 1918/19. Köln, 1970.

MLA (8th ed.) Citation

Koenen, Eckhard. Die Grippepandemie 1918/19. 1970.

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