APA (7th ed.) Citation

Krannhals, H. (1891). Die Influenza-Epidemie des Winters 1889-90 in Riga.

Chicago Style (17th ed.) Citation

Krannhals, H. Die Influenza-Epidemie Des Winters 1889-90 in Riga. St. Petersburg, 1891.

MLA (9th ed.) Citation

Krannhals, H. Die Influenza-Epidemie Des Winters 1889-90 in Riga. 1891.

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